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[A700] Bricked into "Boot image verified failed"

Unfortunately, I've bricked my Acer Tablet after trying to flash this ROM http://forum.xda-developers.com/showthread.php?t=1994294
The installscript finished the flash successfully, but after reboot, the bootloader only shows the message "Boot image verified failed" No booting and no CWM Recovery is available no more. I've tried several times to get into the fastboot mode with pressing the Power Button and Volume Button with the two knobs, but nothing helps. Neither switching the screenlock switch on and off. I figured out by trying, how to get into APX mode, but I don't know, if and how that could help me, solving my problem :/
Before I've tried to flash the ROM, I had CM10 with the Stock Bootloader in Unlocked Mode and CWM 6.0.2.3 Touch installed, but the Aroma Installer seems to have destroyed the CWM and locked my Bootloader again. Is there any way to unbrick the tablet now? Any help would be appreciated

V4lk0 said:
Unfortunately, I've bricked my Acer Tablet after trying to flash this ROM http://forum.xda-developers.com/showthread.php?t=1994294
The installscript finished the flash successfully, but after reboot, the bootloader only shows the message "Boot image verified failed" No booting and no CWM Recovery is available no more. I've tried several times to get into the fastboot mode with pressing the Power Button and Volume Button with the two knobs, but nothing helps. Neither switching the screenlock switch on and off. I figured out by trying, how to get into APX mode, but I don't know, if and how that could help me, solving my problem :/
Before I've tried to flash the ROM, I had CM10 with the Stock Bootloader in Unlocked Mode and CWM 6.0.2.3 Touch installed, but the Aroma Installer seems to have destroyed the CWM and locked my Bootloader again. Is there any way to unbrick the tablet now? Any help would be appreciated
Click to expand...
Click to collapse
Just let the battery run dry. Then let it boot up normally without pressing any buttons when the battery runs out by connecting it to your charger. Hope it works!

Thanks for the reply. I tried that, but nothing happens, just the indicator LED on the power button turns on orange. The tablet does not boot on itself, if I connect the charger. I have to press the power button, but this results again in "Boot image verified failed"
Edit: Update. I figured out how to get into fastboot. I read something on google, with switching the screenlock switch on and off. That doesnt worked for me: The thing was, to hold the power button AND the volume button with the two knobs, then the tablet starts, to release the power button and THEN, while still HOLDING the volume button pressed, to switch on and off the screenlock button. Then the bootloader starts into fastboot mode, going into androidsdk and typed in cmd "fastboot oem unlock" solved the problem. The ROM starts and everything is fine

Why you don't write into the mentioned thread? There seems to come the issues from then ask there, sorry can't understand why opening new thread instead asking there.
Also the first time heard sucha thing, I also change the rooms from cm10 to Jacobus, back to stock, on cool one and to cm and back, to test everything and try something out.
Never had issues buy this ways
Gesendet von meinem GT-N7000 mit Tapatalk 2

I don't have the right to post in the proper thread, so I opened up a new one.

In order to install a JB based ROM, you need the JB compatible CWM. The version of CWM you used is apparently for ICS, so I am a little surprised it worked to install CM10. Where did this 6.0.2.3 come from? Use 6.0.1.5 from pawitp. I've used it and swapped/flashed ROMs at least ten times. Never encountered that issue (or any issue). As a matter of fact, I would just run Vorbeth's EasyRoot as it does all the grunt work for you. I've used it twice and it worked flawlessly.

It is just too late... bad luck for me today, I fullbricked the tablet, after performing a restore with CWM 6.0.1.4. Not bootloader, nothing. Just APX Mode.

V4lk0 said:
It is just too late... bad luck for me today, I fullbricked the tablet, after performing a restore with CWM 6.0.1.4. Not bootloader, nothing. Just APX Mode.
Click to expand...
Click to collapse
Hi I had the same issue after flashing from CM10.1 to CoolOne. However I fixed it by unlocking the bootloader => reinstalling recovery => flashing CM 10.1 back.
Did you have any luck recovering from APX?

Gullinbursti said:
Did you have any luck recovering from APX?
Click to expand...
Click to collapse
No, unfortunately not. I gave my tablet 2 weeks ago to the acer repair service and got it back today. The support said, that they have changed the mainboard and flashed the latest android on the tablet, but they did that on guarantee, so I didn't had to pay something ^^ Now it is running Android 4.1.1 Stock ROM from Acer.

Exact same problem
I am having the exact same problem. I am able to boot into recovery mode but then I get the android laying down with with the red triangle, question mark. My bootloader is unlocked but aftrer the update my screen is stucked on the ICONIA TAB startup screen.

[A700] bricked infinite boot loop

So starting from beginning, while playing some music, my A700 reboot and hang up in infinite loop of Acer and Iconia Tab logos. As Vol+Power was not responding, I sent it back to Acer for repair and received it back yesterday after they replaced motherboard (and microphone!?).
Cool.
But no, because after a couple of hours of re-installing, it reboot and finished in the same Logos loop, just after selecting Airplane mode.
So my question, can I re-flash this A700 with a complete clean stock ROM, as I have only access to Fastboot mod?

To reflash with fastboot, you'd need an unlocked bootloader. I wouldn't risk that if I were you.
It looks likes a hardware issue. A ROM contains drivers. Drivers control the hardware. When going into airplane mode, the drivers shut down some of the hardware components, like WIFI and Bluetooth. If you'd have a modded ROM, I'd say there's some driver issue which causes the tablet to crash (weird that it's stuck on bootloop, though). Since that's not the case, I'd say there's something wrong with your hardware.
To apply factory settings, did you do the right moves?:
http://forum.xda-developers.com/showthread.php?t=1861092
How did you enter fastboot mode?
Note that there's only a slight difference in going into fastboot or the factory reset mode. It's only a Vol + and -.

I was asking because I already flashed (in November) my 'previous' A700 with a stock ROM (because JB OTA update failed) without unlocking anything (but using Recovery).
You are probably right, it may be an hardware fault as it does exactly the same as first time and that Acer Support replaced complete motherboard. However it was looking at me very strange that I could get two hardware fault in the row.
I will give a try to the factory reset (I did not knew the move), thanks for the tips.

As far as I know it's not possible to flash a stock ROM with fastboot without unlocking the bootloader. Instead, you have to rename the stock ROM to update.zip and put it on your internal storage and then flash it by using recovery (also a button trick).
It could be that it's still the same hardware problem. Maybe Acer didn't know what was wrong and just replaced the motherboard. It's a massive repairing service center, so they're not going to search for everything.
Oh, an important question:
Did Acer, or did they not reinstall your tablet after they "repaired" it?
If not, then it might just be that. It's like your home pc. When you change your motherboard, you might need to reinstall the thing (or re-activate Windows, but that's not relevant ) to prevent errors.
Good luck and I hope you succeed
Ps. For what it's worth, you can also try to reflash your device with a beta ROM (it's beta because there isn't a stock ROM available which you can flash without having the bootloader unlocked). You can download it here. Now I'm not quite sure if you can update your tablet then, so it's coming out of beta. To flash it, do whatever I said with the renaming to update.zip (to transfer the ROM, you can use an sd card. It might just look for update.zip on the sdcard too). Please keep in mind that I'm not sure if you can update your tablet so it'll come out of beta. If you are going to try this, please post your results here

troun2000 said:
So starting from beginning, while playing some music, my A700 reboot and hang up in infinite loop of Acer and Iconia Tab logos. As Vol+Power was not responding, I sent it back to Acer for repair and received it back yesterday after they replaced motherboard (and microphone!?).
Cool.
But no, because after a couple of hours of re-installing, it reboot and finished in the same Logos loop, just after selecting Airplane mode.
So my question, can I re-flash this A700 with a complete clean stock ROM, as I have only access to Fastboot mod?
Click to expand...
Click to collapse
Considering the same issue happened under the same circumstances, we can pretty much rule out hardware failure. (they claim to have changed the mainboard.
If you look at the Acer 700 troubleshooting tree, they followed procedures. Or perhaps they "claimed" to have changed the system board, when in reality they just re-flashed the rom over the top so they can make more money by the hour. A common practice.
So the issue to me, seems to be either a faulty rom, or, faulty player. Were you using a player from the Play Store?
Also, would help to know which OS you were on. ICS or JB?
As with re-installing a rom, you should be able to get to the stock recovery. In which case, you could try
a. Re-installing the stock version rom again (renamed as update.zip)
b. Install an update.zip compatible with your region.
There are 2 types of boot loop.
1. Iconia.... this is a boot animation loop (stuck at boot animation)
2. Tab continually re-boots over and over. This is a boot-loop
3. Although not considered a boot-loop, stuck at the Acer logo.
So which do you have?
More than likely you have animation loop. Which means the OS is corrupted somehow.If I understand you correctly.
As with fastboot OEM unlock, you can do the following;
Flash a custom recovery
Flash a kernel (boot.img)
Flash a complete system image. This is not like flashing a Rom. It's an image file generated from another user who has a working 700.
As with unlocking your bootloader, well, it depends on if you wish to get things fixed. Or to return it yet again to Acer Repair. Can't tell you what to do Mate. But if it were me, I would take matters into my own hands after previous attempts.
MD

So I tried the following (yes, it is inverted relative to theory);
- Press [vol +] + [power]
- As soon as the tablet vibrates, let go of power and play several times [lock]
=> Fastboot mod, displaying "Bootloader vJB-653b3d3: Starting Fasboot USB download protocol"
- Press [vol-] + [power]
- As soon as the tablet vibrates, let go [power] and play [lock]
=> no effect
And as reminder, Recovery is not reachable.
TomONeill said:
As far as I know it's not possible to flash a stock ROM with fastboot without unlocking the bootloader. Instead, you have to rename the stock ROM to update.zip and put it on your internal storage and then flash it by using recovery (also a button trick).
It could be that it's still the same hardware problem. Maybe Acer didn't know what was wrong and just replaced the motherboard. It's a massive repairing service center, so they're not going to search for everything.
(...)
Ps. For what it's worth, you can also try to reflash your device with a beta ROM (it's beta because there isn't a stock ROM available which you can flash without having the bootloader unlocked). You can download it here. Now I'm not quite sure if you can update your tablet then, so it's coming out of beta. To flash it, do whatever I said with the renaming to update.zip (to transfer the ROM, you can use an sd card. It might just look for update.zip on the sdcard too). Please keep in mind that I'm not sure if you can update your tablet so it'll come out of beta. If you are going to try this, please post your results here
Click to expand...
Click to collapse
So I guess I can not flash, because I do not have access to recovery, only to fastboot.
TomONeill said:
Oh, an important question:
Did Acer, or did they not reinstall your tablet after they "repaired" it?
If not, then it might just be that. It's like your home pc. When you change your motherboard, you might need to reinstall the thing (or re-activate Windows, but that's not relevant ) to prevent errors.
Good luck and I hope you succeed
Click to expand...
Click to collapse
Yes they re-install OS as the A700 came back with a German Rom where I sent it with a French Rom.
Thanks a lot for your help :good:

Moscow Desire said:
Also, would help to know which OS you were on. ICS or JB?
[...]
There are 2 types of boot loop.
1. Iconia.... this is a boot animation loop (stuck at boot animation)
2. Tab continually re-boots over and over. This is a boot-loop
3. Although not considered a boot-loop, stuck at the Acer logo.
So which do you have?
Click to expand...
Click to collapse
Can you answer both questions MD asked you?
If you're running Jelly Bean, the bootloader has changed. This requires a different way of going in the recovery mode:
DЯΦ[email protected]П said:
With JB there is a change on the A700 (can't test on A701):
Boot into recovery:
- Press [vol-] + [power]
- Once the tablet vibrated, let go [power] and keep [vol-].
- Now the tablet vibrates a second time, let go [vol-] and press [vol+] quick
- Once the text that appears on the screen ("loading recovery kernel image"), let go [vol+].
Click to expand...
Click to collapse

Moscow Desire said:
Considering the same issue happened under the same circumstances, we can pretty much rule out hardware failure.
Click to expand...
Click to collapse
Not really, first time it happened while playing music with google music player (reboot then loop).
Second time it was after setting the Airplane mode for night (reboot then loop).
Moscow Desire said:
(they claim to have changed the mainboard).
If you look at the Acer 700 troubleshooting tree, they followed procedures. Or perhaps they "claimed" to have changed the system board, when in reality they just re-flashed the rom over the top so they can make more money by the hour. A common practice.
Click to expand...
Click to collapse
I though the same but I found a 'technical paper' saying that board and microphone were changed, and both Wifi and Bluetooth Mac adresses have changed. So it seems they really changed motherboard.
Moscow Desire said:
So the issue to me, seems to be either a faulty rom, or, faulty player. Were you using a player from the Play Store?
Also, would help to know which OS you were on. ICS or JB?
Click to expand...
Click to collapse
Rom were 'different' when it happened; first was an FR and second was a DE. It was google stock player (only first time).
JB both times.
Moscow Desire said:
As with re-installing a rom, you should be able to get to the stock recovery. In which case, you could try
a. Re-installing the stock version rom again (renamed as update.zip)
b. Install an update.zip compatible with your region.
Click to expand...
Click to collapse
I do not have access to stock recovery, only fastboot mode
Moscow Desire said:
There are 2 types of boot loop.
1. Iconia.... this is a boot animation loop (stuck at boot animation)
2. Tab continually re-boots over and over. This is a boot-loop
3. Although not considered a boot-loop, stuck at the Acer logo.
So which do you have?
More than likely you have animation loop. Which means the OS is corrupted somehow.If I understand you correctly.
Click to expand...
Click to collapse
I have;
Acer Logo/animation -> Inconia Tab Logo/animation -> reboot -> Acer Logo/animation -> and so on...
Moscow Desire said:
As with fastboot OEM unlock, you can do the following;
Flash a custom recovery
Flash a kernel (boot.img)
Flash a complete system image. This is not like flashing a Rom. It's an image file generated from another user who has a working 700.
As with unlocking your bootloader, well, it depends on if you wish to get things fixed. Or to return it yet again to Acer Repair. Can't tell you what to do Mate. But if it were me, I would take matters into my own hands after previous attempts.
MD
Click to expand...
Click to collapse
OK, that helps a lot, thanks. I guess what I would like to do is to flash a system Image. Where can I get one?
So far, I have Android SDK installed and Acer drivers installed (which bring me a "ADB interface"-"Acer fastboot interface" device in Windows Device manager)

[Q] Loaded Wrong TWRP on TF300T and can only access APX mode

Hello,
I loaded the wrong version of TWRP on my TF300T. When it rebooted it loaded CM10.1 just fine. I then rebooted a second time in recovery mode and I have been stuck at the ASUS screen with the "device is unlocked" message. I am able to get into APX mode but my research has shown that mode doesn't do me any good if I haven't ran a nvflash backup. I am stuck and I would appreciate some advice or suggestions. I wonder what the factory reset fee would be from ASUS.
Thank you for your responses!

what version where you on? what version did you load that you think you shouldn't? Can you enter recovery mode? fastboot mode? I used fastboot to fix my recovery TWRP just can't find the thread I got my info from.
if your seeing the asus screen like you say I don't think it has anything to do with your recovery. I just went though fixing my mistake and breaking my install of TWRP 2.4.4 patched had to install 2.5 TWRP and when I restored my backup 2.4.4 was back and working again. anyway while the recovery was broken I could still run the stock rom that was installed at that time. I think if your on the asus screen your kernel has an issue.
I don't know where I read about issues like this but I know others have had em and recovered search or someone else should be able to point in a direction but have hope doesn't sound bricked yet.
Sent from my Customized Transformer TF300T using TapaTalk HD

macgyver40 said:
what version where you on? what version did you load that you think you shouldn't? Can you enter recovery mode? fastboot mode? I used fastboot to fix my recovery TWRP just can't find the thread I got my info from.
if your seeing the asus screen like you say I don't think it has anything to do with your recovery. I just went though fixing my mistake and breaking my install of TWRP 2.4.4 patched had to install 2.5 TWRP and when I restored my backup 2.4.4 was back and working again. anyway while the recovery was broken I could still run the stock rom that was installed at that time. I think if your on the asus screen your kernel has an issue.
I don't know where I read about issues like this but I know others have had em and recovered search or someone else should be able to point in a direction but have hope doesn't sound bricked yet.
Sent from my Customized Transformer TF300T using TapaTalk HD
Click to expand...
Click to collapse
Thanks for the speedy response =)
Version History: Stock 4.1 -> CM 10.1 Nightly 0503 or 0429. I had CWM on it before trying to load openrecovery-twrp-2.5.0.0-tf300t-ICS.blob using the terminal emulator method. I think I should have loaded the JB blob but the warning on the TWRP site said to use that if you ran the offical OTA update, which I never did so I stuck with the ICS. It installed fine, then rebooted into CM 10.1 just fine. I then rebooted from there into recovery and have been stuck at the ASUS screen since.
The Vol + - button keeps me in the ASUS screen. Reset button keeps me in the asus screen. Vol + + puts me in APX mode.
I try running fastboot in APX mode but it hangs stating "waiting for device" so I don't think it'll work in APX mode.
Thanks.
T

Try waiting for the battery to die, then boot in CM10 and flash the correct recovery.

c0ded said:
Try waiting for the battery to die, then boot in CM10 and flash the correct recovery.
Click to expand...
Click to collapse
I bled it last night. I'll try booting it this evening. Thanks!

racet said:
I bled it last night. I'll try booting it this evening. Thanks!
Click to expand...
Click to collapse
No luck. I bled it twice and I'm still stuck at the ASUS logo with "the device is unlocked"
Am I looking at repair here?

If you send it in for repair, ASUS will charge you $198. I suggest you buy a replacement motherboard off of eBay and replace it with the one in your tablet. Also, to save other people's tablets from bricks, you may want to look into this petition.

if you get stuck in fastboot mode then there is a zip file I will find the thread again and it has cmd files that run the fastboot stuff. I was stuck not able to use fastboot commands and then the zip I found worked like a charm.
its a zip file called adb-t.. instructions where to put the twrp.blob in the folder and the update in my case 10.6.1.15.3.zip and it flashed it even though i couldn't manually do it. really wish I could find that thread but I don't have my laptop right now
Sent from my Customized Transformer TF300T using TapaTalk HD

c0ded said:
If you send it in for repair, ASUS will charge you $198. I suggest you buy a replacement motherboard off of
Wow 200$ what a load. To what degree of difficulty are we talking with replacing the mobo? Ifixit makes it look doable, yet at the end he messed up his LCD screen.
Click to expand...
Click to collapse

macgyver40 said:
if you get stuck in fastboot mode then there is a zip file I will find the thread again and it has cmd files that run the fastboot stuff. I was stuck not able to use fastboot commands and then the zip I found worked like a charm.
its a zip file called adb-t.. instructions where to put the twrp.blob in the folder and the update in my case 10.6.1.15.3.zip and it flashed it even though i couldn't manually do it. really wish I could find that thread but I don't have my laptop right now
Sent from my Customized Transformer TF300T using TapaTalk HD
Click to expand...
Click to collapse
I would def like to try it if you can find it.
T

please give me some time. laptop is home again but I need time to look thought my browser history to find the thread. I was searching TWRP 2.5 threads.
I could also find a place to drop the zip file its very small. you would just need the correct TWRP.blob file and a ROM if you want to do that also from this file set I found.
Sent from my Customized Transformer TF300T using TapaTalk HD
http://forum.xda-developers.com/showthread.php?t=2041528
found it. Hope this helps you like it helped me out of my broken recovery. once you download and add the files you want its pretty easy. the script in english makes it pretty easy to understand what your doing and hope it works since I know my TWRP was broken I couldn't even sit at the recover,android wipe screen for more then 3 mins without it bootlooping. I put it on that screen while connected to laptop ran the recovery flash and all went well installing TWRP 2.5 which I then recovered my backup and that even restored my 2.4.4 patch TWRP like nothing happened at all. tablet runs great and have made 3 backups that work after all this.
Good luck

macgyver40 said:
please give me some time. laptop is home again but I need time to look thought my browser history to find the thread. I was searching TWRP 2.5 threads.
I could also find a place to drop the zip file its very small. you would just need the correct TWRP.blob file and a ROM if you want to do that also from this file set I found.
Sent from my Customized Transformer TF300T using TapaTalk HD
Click to expand...
Click to collapse
Please take your time. I have no problem waiting especially if the only solution is to drop 75$ on a replacement mobo.
You could send me the file via email or drop box if it's easier. I was going to use the TWRP 2.5 JB with CM 10.1 nightly. I appreciate all the help!
T

look at my please wait thread. found the link in 2 mins and added it above plus a little on why I used it and how bad mine was so to explain why I have hope for yours.
Sent from my Customized Transformer TF300T using TapaTalk HD

Power up your tablet while holding down the Vol- button, then wait until a menu appears on your tablet. Within 10 seconds, hit the Vol- button.
On your computer, run "fastboot devices". If it finds your tablet, then download the correct recovery (http://techerrata.com/file/twrp2/tf300t/openrecovery-twrp-2.5.0.0-tf300t-JB.blob), copy it to your fastboot directory, then flash it using:
fastboot -i 0x0B05 flash recovery openrecovery-twrp-2.5.0.0-tf300t-JB.blob
Followed by a reboot:
fastboot reboot

macgyver40 said:
look at my please wait thread. found the link in 2 mins and added it above plus a little on why I used it and how bad mine was so to explain why I have hope for yours.
Sent from my Customized Transformer TF300T using TapaTalk HD
Click to expand...
Click to collapse
I tried running through your tread but none of the commands worked on the script. Probably because I can't get fastboot to work. When it tries to load a recovery it just states: "waiting for device" and sits there. =/

c0ded said:
Power up your tablet while holding down the Vol- button, then wait until a menu appears on your tablet. Within 10 seconds, hit the Vol- button.
On your computer, run "fastboot devices". If it finds your tablet, then download the correct recovery (http://techerrata.com/file/twrp2/tf300t/openrecovery-twrp-2.5.0.0-tf300t-JB.blob), copy it to your fastboot directory, then flash it using:
fastboot -i 0x0B05 flash recovery openrecovery-twrp-2.5.0.0-tf300t-JB.blob
Followed by a reboot:
fastboot reboot
Click to expand...
Click to collapse
Thanks for the info. I am unable to get fastboot to recognize the device. The only way the PC recognizes it is via APX mode. Download mode just sits there at the ASUS screen and windows doesn't see any devices.

Still no love. Am I bleeding out the battery correctly? I am just running the boot screen until it dies then I try to power it on again.
I popped the back open today to see how difficult it would be to replace the mobo, doesn't look too bad. Just having difficulty finding a good online guide.
Also, just so I have the terminology straight, when the tf300t goes into a "boot loop" does it ever leave the asus screen and go black or does it just hang? Mine never goes black, just sits at the ASUS screen with "the device is unlocked" message. The only time I can get it to leave this screen is when I do a reboot and hold the + sign. then it goes black and APX is detected on windows.
Just wasn't sure if any of that information was useful.
T

One other solution is to unplug the battery for 30 minutes, then plug it back in.

c0ded said:
One other solution is to unplug the battery for 30 minutes, then plug it back in.
Click to expand...
Click to collapse
Ok,
Tried disconnecting the mobo, no love. Ordered a new one for 75$ on ebay. Replaced the mobo and now the volume button doesn't work. Checked all the ribbon cables and they're snug. Probably broke something but I can't find what, so I am thinking of sucking that up. I can control volume with the settings. The only downfall is without a volume button I can't enter the boot loader, so no rooting/ cwm.
Least I'm back in business for now! And another positive is the mobo I received was 32 gig storage so it's like I got an upgrade... with a broken volume button =)

racet said:
Ok,
Tried disconnecting the mobo, no love. Ordered a new one for 75$ on ebay. Replaced the mobo and now the volume button doesn't work. Checked all the ribbon cables and they're snug. Probably broke something but I can't find what, so I am thinking of sucking that up. I can control volume with the settings. The only downfall is without a volume button I can't enter the boot loader, so no rooting/ cwm.
Least I'm back in business for now! And another positive is the mobo I received was 32 gig storage so it's like I got an upgrade... with a broken volume button =)
Click to expand...
Click to collapse
Usually, the volume button does not fail. Remember the volume button connects to, but is NOT part of the mother board. If it feels stuck when you push it, that's because you snapped the back cover in wrong. You need to slide it in at the corner where the buttons (volume & power) are, then pop in the rest of it. Take it out and do it again.

[Q] Bricked TF300T (APX mode only, no nvflash) – any hope?

I bricked a TF300T today, and I'd like to know if there is possibility that it might be repaired.
I was attempting to install CyanogenMod 10.1 on the tablet for my friends, which I offered to do since I have a bit of experience doing similar on other devices. It was running Android 4.2, and had the latest firmware (v10.6.1.15.3, WW). After researching the XDA forums, I unlocked and rooted the device, and installed the TWRP recovery (2.5.0.0). I used TWRP to flash CM 10.1 and the Google apps, but when I tried to boot I got stuck at the Asus logo. After some more research I realized that the official release of CM doesn't work with the 4.2 bootloader, and that if I wanted to install that ROM I would need to downgrade my bootloader (right?).
The trouble occurred during the downgrade. I downloaded the 10.4.2.20 firmware and used flashboot to flash it. The flash completely successfully and I was going to run "flashboot reboot." Thinking I'd save keystrokes on the command line, I hit the up arrow to call up my last command, and meant to delete the last half of it, but I managed to hit 'enter' instead, starting the flash over again. I cancelled the command (^C), which might not have been wise -- but then I made my dumbest move, and powered the device off. (I'm not really sure why; I guess I assumed I'd still be able to get into fastboot mode.)
Now the device will not boot at all, except into APX mode -- i.e., the screen is blank, but when plugged into the computer the device registers. From what I've read here, there isn't really anything useful I can do in APX mode, given that I never setup nvflash, and I can't figure out any way of getting the tablet to do anything else.
Is there anything I've missed? Is there anything I could accomplish by cracking open the tablet (popping out the battery)? I've seen references to replacing the logic board – would that work, and how should I go about this? I know most if not all of these questions have been answered in different places before, and I tried to do my homework, but I figured I'd ask in case anyone had new experience or expertise to share.

I think to only solution is to replace the main board OR buy a new tablet :'(
Sent from my ASUS Transformer Pad TF300T

jay-roc said:
I bricked a TF300T today, and I'd like to know if there is possibility that it might be repaired.
I was attempting to install CyanogenMod 10.1 on the tablet for my friends, which I offered to do since I have a bit of experience doing similar on other devices. It was running Android 4.2, and had the latest firmware (v10.6.1.15.3, WW). After researching the XDA forums, I unlocked and rooted the device, and installed the TWRP recovery (2.5.0.0). I used TWRP to flash CM 10.1 and the Google apps, but when I tried to boot I got stuck at the Asus logo. After some more research I realized that the official release of CM doesn't work with the 4.2 bootloader, and that if I wanted to install that ROM I would need to downgrade my bootloader (right?).
The trouble occurred during the downgrade. I downloaded the 10.4.2.20 firmware and used flashboot to flash it. The flash completely successfully and I was going to run "flashboot reboot." Thinking I'd save keystrokes on the command line, I hit the up arrow to call up my last command, and meant to delete the last half of it, but I managed to hit 'enter' instead, starting the flash over again. I cancelled the command (^C), which might not have been wise -- but then I made my dumbest move, and powered the device off. (I'm not really sure why; I guess I assumed I'd still be able to get into fastboot mode.)
Now the device will not boot at all, except into APX mode -- i.e., the screen is blank, but when plugged into the computer the device registers. From what I've read here, there isn't really anything useful I can do in APX mode, given that I never setup nvflash, and I can't figure out any way of getting the tablet to do anything else.
Is there anything I've missed? Is there anything I could accomplish by cracking open the tablet (popping out the battery)? I've seen references to replacing the logic board – would that work, and how should I go about this? I know most if not all of these questions have been answered in different places before, and I tried to do my homework, but I figured I'd ask in case anyone had new experience or expertise to share.
Click to expand...
Click to collapse
APX mode is useless without nvflash installed and nvflash can only be installed while on ICS and once you leave ICS you can't go back.
Some Info: the vehicles to recover without nvflash are
1. recovery - stock or twrp
2. adb
3. fastboot
Do any of these work?
Try this link to find ways you may not have used yet -to get to the bootloader - thus recovery or fastboot
[GUIDE] Enter APX mode or Bootloader-recovery menu!
For future reference here is the way I see the recovery and rom matching issue.
4.1 bootloader - 10.4.2.9, 10.4.2.13, 10.4.2.17, 10.4.2.18, 10.4.2.20 - twrp openrecovery-twrp-2.5.0.0-tf300t-JB.blob
4.2 bootloader - 10.6.1.8 - twrp openrecovery-twrp-2.4.4.0-tf300t-4.2.blob
4.2.1 bootloader - 10.6.1.15.3 - twrp openrecovery-twrp-2.5.0.0-tf300t-4.2.blob

tobdaryl said:
APX mode is useless without nvflash installed and nvflash can only be installed while on ICS and once you leave ICS you can't go back.
Some Info: the vehicles to recover without nvflash are
1. recovery - stock or twrp
2. adb
3. fastboot
Do any of these work?
Try this link to find ways you may not have used yet -to get to the bootloader - thus recovery or fastboot
[GUIDE] Enter APX mode or Bootloader-recovery menu!
Click to expand...
Click to collapse
Thanks for the response. I've already tried the relevant methods in the guide, except for disconnecting the battery. I can get into APX mode -- the tablet registers as an APX device when plugged into the computer -- but I can't get it to enter the bootloader, so recovery, adb, and fastboot do not work. At this point I don't have much hope that the device will ever boot again without replacing the motherboard.

jay-roc said:
Thanks for the response. I've already tried the relevant methods in the guide, except for disconnecting the battery. I can get into APX mode -- the tablet registers as an APX device when plugged into the computer -- but I can't get it to enter the bootloader, so recovery, adb, and fastboot do not work. At this point I don't have much hope that the device will ever boot again without replacing the motherboard.
Click to expand...
Click to collapse
I'm sorry, I hoped the guide would give you a chance of recovery.

I definitely appreciate the help, and the guide's a great resource.
tobdaryl said:
I'm sorry, I hoped the guide would give you a chance of recovery.
Click to expand...
Click to collapse

jay-roc said:
I definitely appreciate the help, and the guide's a great resource.
Click to expand...
Click to collapse
You are welcome!
I had wished for better results.
Good Luck!

noahvt said:
I think to only solution is to replace the main board OR buy a new tablet :'(
Click to expand...
Click to collapse
Is there any tips for buying mainboard? Should it be exactly the same as in my tablet (I mean the same region and, therefore, version of ROM installed), maybe serials.
I have a bricked TF300T, and the only way I have to resurrect it - MB replacement. So, please, ANY info will be useful. Thanks in advance.

try to get it into fastboot somehow - i was stuck in apx too but with a bit of trying i was able to get to fastboot (try resetbutton + vol-down, let it completly drain of power, charge it back and try again)
here is what i did after i regained fastboot:
http://forum.xda-developers.com/showpost.php?p=44244313&postcount=12
gl
-Buster

Buster99 said:
try to get it into fastboot somehow - i was stuck in apx too but with a bit of trying i was able to get to fastboot (try resetbutton + vol-down, let it completly drain of power, charge it back and try again)
here is what i did after i regained fastboot:
http://forum.xda-developers.com/showpost.php?p=44244313&postcount=12
gl
-Buster
Click to expand...
Click to collapse
I'm so damn appreciated! Thank you so much)) I'd add this way to get to fastboot - adb reboot fastboot - just from faulty CWM. Other way it didn't worked.

I got mine working this way
Link to my thread --> http://forum.xda-developers.com/showthread.php?p=45120193#post45120193
Hope it helps. Try It!

ozkrtech said:
Link to my thread --> http://forum.xda-developers.com/showthread.php?p=45120193#post45120193
Hope it helps. Try It!
Click to expand...
Click to collapse
I have the same problem...
My TF300T got bricked and now i cant boot at all anymore, i just see the Asus logo.
Vol down and power doesnt work but i think i can boot it into APX mode, screen stays black but my pc recognises an APX device.
At first my pc didnt install the driver but than i found APX drivers in these forums.
I've downloaded the APX drivers from a thread and i can choose to install various drivers, i tried all of them.
The one i think i need is the Asus Transformer ADB interface driver but this one along with every other one i can choose from doesn't work.
After installing and trying fastboot devices and adb devices i never had a device name show up
im kinda stuck right now
Can anyone please give me some advice ?
Cheers, any help is appreciated
marty

martyzzz said:
I have the same problem...
My TF300T got bricked and now i cant boot at all anymore, i just see the Asus logo.
Vol down and power doesnt work but i think i can boot it into APX mode, screen stays black but my pc recognises an APX device.
At first my pc didnt install the driver but than i found APX drivers in these forums.
I've downloaded the APX drivers from a thread and i can choose to install various drivers, i tried all of them.
The one i think i need is the Asus Transformer ADB interface driver but this one along with every other one i can choose from doesn't work.
After installing and trying fastboot devices and adb devices i never had a device name show up
im kinda stuck right now
Can anyone please give me some advice ?
Cheers, any help is appreciated
marty
Click to expand...
Click to collapse
Can you explain me step by step what you did to get bricked? Are you on bootloader 4.1 or 4.2+? 10.4.x.x is 4.1 and 10.6.x.x is 4.2+

ozkrtech said:
Can you explain me step by step what you did to get bricked? Are you on bootloader 4.1 or 4.2+? 10.4.x.x is 4.1 and 10.6.x.x is 4.2+
Click to expand...
Click to collapse
Bought the Asus tab a year back and kept it original and updated by Asus for a few months.
Begin this year i unlocked it through a guide here on XDA (i dont thin through the Asus APK but another way).
After it succesfully unlucked (you could see "your device is unlocked" in the left top of the Asus boot screen i installed CWM.
After CWM i installed Cyogenmod 10.1 and kept it updated for months
This was all in the beginning of this year...
In june after updating Cyogenmod 10.1 to a newer version it wouldnt boot up anymore (i still had acces to my CWM recovery at this time).
So i switched back to the last working Cyogenmod 10.1 version (think it was 15th or 16th june).
I left it again for 2 months, still everything was fine till i saw that Cyogenmod 10.2 was out on XDA.
The upcomming is all last week;
First i tried to install 10.2 through CWM but my tab wouldnt boot up.
Than i switched recovery through fastboot because i have read that 10.2 was only compatible with TWRP 2.5+ so i got the latest TWRP
(2.6.0.0 i think)
After booting into TWRP i fully wiped the tab (i might have wiped everything because i dont know TWRP so well), after the wipe i wanted to install 10.2 again.
My tab still didnt boot so i got anctious and wanted to switch back to my latest version 10.1 (june 2013 that did work) so i could at least use my tab again.
Installing 10.1 again didnt work through TWRP, after that i came to the conclusion that i couldt install any rom anymore, at every rom i got an error in TWRP so i thought i had the wrong TWRP installed. (see my other post for a link to the screenshot of the error msge, i just cant find it atm).
Last but not least i tried to load my old CWM again as recovery, after i did this i couldnt get into recovery anymore...
Thans basicly the whole story.
Hope some1 can help me out.
Thanks in advance !
Cheers

martyzzz said:
Bought the Asus tab a year back and kept it original and updated by Asus for a few months.
Begin this year i unlocked it through a guide here on XDA (i dont thin through the Asus APK but another way).
After it succesfully unlucked (you could see "your device is unlocked" in the left top of the Asus boot screen i installed CWM.
After CWM i installed Cyogenmod 10.1 and kept it updated for months
This was all in the beginning of this year...
In june after updating Cyogenmod 10.1 to a newer version it wouldnt boot up anymore (i still had acces to my CWM recovery at this time).
So i switched back to the last working Cyogenmod 10.1 version (think it was 15th or 16th june).
I left it again for 2 months, still everything was fine till i saw that Cyogenmod 10.2 was out on XDA.
The upcomming is all last week;
First i tried to install 10.2 through CWM but my tab wouldnt boot up.
Than i switched recovery through fastboot because i have read that 10.2 was only compatible with TWRP 2.5+ so i got the latest TWRP
(2.6.0.0 i think)
After booting into TWRP i fully wiped the tab (i might have wiped everything because i dont know TWRP so well), after the wipe i wanted to install 10.2 again.
My tab still didnt boot so i got anctious and wanted to switch back to my latest version 10.1 (june 2013 that did work) so i could at least use my tab again.
Installing 10.1 again didnt work through TWRP, after that i came to the conclusion that i couldt install any rom anymore, at every rom i got an error in TWRP so i thought i had the wrong TWRP installed. (see my other post for a link to the screenshot of the error msge, i just cant find it atm).
Last but not least i tried to load my old CWM again as recovery, after i did this i couldnt get into recovery anymore...
Thans basicly the whole story.
Hope some1 can help me out.
Thanks in advance !
Cheers
Click to expand...
Click to collapse
What happends when you press volume down+ power?
It jeeps rebooting or it goes to black screen? Have you tried pressing the reset button is below the micro sdcard slot.
You should be able to boot any recovery.

is I recall correctly cm switched partition layout to 4.2 on tf300.
if you still have fastboot try my guide to flash stock and then flash recovery and cm10.2. since it sounds a lot like my error I had with cm it should work for you as well.
good luck
Sent from my TF300T using xda app-developers app

ozkrtech said:
What happends when you press volume down+ power?
It jeeps rebooting or it goes to black screen? Have you tried pressing the reset button is below the micro sdcard slot.
You should be able to boot any recovery.
Click to expand...
Click to collapse
When i press vol down+power i get the asus boot screen for a minute or 2, the tab switches off and on again to the same boot screen.
I cant boot into recovery
---------- Post added at 06:51 PM ---------- Previous post was at 06:42 PM ----------
Buster99 said:
is I recall correctly cm switched partition layout to 4.2 on tf300.
if you still have fastboot try my guide to flash stock and then flash recovery and cm10.2. since it sounds a lot like my error I had with cm it should work for you as well.
good luck
Sent from my TF300T using xda app-developers app
Click to expand...
Click to collapse
I dont have fastboot in any way.
I can only power on the device with volume up + power to enter APX mode, than only my pc sees a USB device.
I tried a lot of differtent drivers but for nome of them i can ADB of Fastboot to the device.
It would help if someone that has managed to unbrick through APX mode posted the right driver for a TF300T
Cheers

have you tried the apx drivers that come with the sdk?
Sent from my GT-I9505 using xda app-developers app

Buster99 said:
have you tried the apx drivers that come with the sdk?
Sent from my GT-I9505 using xda app-developers app
Click to expand...
Click to collapse
Ive tried searching in the SDK forders but i cant find any.
If i try to install drivers automaticly and than point to the root SDK folder i get the windows msge the best drivers are already installed (no matter what driver is in stalled at that time)

martyzzz said:
Ive tried searching in the SDK forders but i cant find any.
If i try to install drivers automaticly and than point to the root SDK folder i get the windows msge the best drivers are already installed (no matter what driver is in stalled at that time)
Click to expand...
Click to collapse
don't just point at the folder
manually select the driver for the device from android-sdk\extras\google\usb_driver
gl

[Q] Bricked TF700

Hi.
I own a TF700T and seems to have bricked it. Last status was: I had the latest stock ROM with root running and wanted to get a CM11 based 4.4.2 image from here. I downloaded it and used rom manager to get it installed. But the install script failed at some point and I thought the recovery might be outdated. So I used ROM Manager to update recovery... I tried CWM and TWRP option. Finally I booted up into recovery trying again to install those damn rom - I used the option to wipe all data / settings from the main menu and tried again to install the ROM which again failed (I do not remember the error message clearly). I gave up. I used the "reboot" option.
Now:
- Powering up gets me into the screen with the ASUS logo (left upper corner says "the device is unlocked"). Here it is stuck forever.
- Power + Vol-Down is same as just Power - I do not get into flashboot with those 3 small icons... I just get the ASUS logo and nothing else happens. Reset hole does not change situation. The device is pretty much "always on" now (till battery is exhausted) as long-press Power turns off and immediately on again
- Only thing that seems to work: Power + Vol-Up ends up in APX mode - my computer recognizes the device via USB at this point
Unfortunately I never did any set up to nvflash.
Do I have any chance to get this thing alive again?
Thanks a lot in advance,
q2.

Quentin2 said:
Hi.
I own a TF700T and seems to have bricked it. Last status was: I had the latest stock ROM with root running and wanted to get a CM11 based 4.4.2 image from here. I downloaded it and used rom manager to get it installed. But the install script failed at some point and I thought the recovery might be outdated. So I used ROM Manager to update recovery... I tried CWM and TWRP option. Finally I booted up into recovery trying again to install those damn rom - I used the option to wipe all data / settings from the main menu and tried again to install the ROM which again failed (I do not remember the error message clearly). I gave up. I used the "reboot" option.
Now:
- Powering up gets me into the screen with the ASUS logo (left upper corner says "the device is unlocked"). Here it is stuck forever.
- Power + Vol-Down is same as just Power - I do not get into flashboot with those 3 small icons... I just get the ASUS logo and nothing else happens. Reset hole does not change situation. The device is pretty much "always on" now (till battery is exhausted) as long-press Power turns off and immediately on again
- Only thing that seems to work: Power + Vol-Up ends up in APX mode - my computer recognizes the device via USB at this point
Unfortunately I never did any set up to nvflash.
Do I have any chance to get this thing alive again?
Thanks a lot in advance,
q2.
Click to expand...
Click to collapse
Unfortunately ROM Manager does not work with the TF700 and you are not the first one to find out the hard way...
If you cannot find a way to boot into the bootloader to have fastboot, there's nothing you can do anymore without the NVflash blobs.
Did you try holding Vol - and then pressing the reset button in that little pinhole on the side of the tablet?
If you have ADB drivers installed on your PC you could try if you can establish an ADB connection at any point. If you did, you could issue the command: "adb reboot bootloader", which would enable you to flash a recovery and/or bootloader. This probably won't work since you need to be in the recovery or have Android booted for ADB to work, but worth a try anyway...
Admittedly these are very thin straws - but what have you got to loose?
Also: Just a few days ago a user here was stuck on a bootloop to recovery and couldn't get out of it. He left it alone overnight and all the sudden the bootloop sorted itself out... I have no explanation for it and it is unlikely to happen in your case, but you never know...
Good luck!

Thanks for replying.
Yes, I did keep Vol-Down (means Vol-Left) pressed while pinching the reset button. It did not help.
I will experiment a bit more. It's not really a boot "loop" - it gets stuck at the ASUS logo and this does not change anymore. Not overnight.
So far I could only see it being recognized as USB device in APX mode. Can you give me a bit background here? I have nvflash here. The blobs are not available anywhere on the net? Or why is that all a big fuzz? I used to have a Notion Ink Adam and APX saved my life several times, but the blobs were available to everybody. Nobody has the blobs here? Or are they device-specific?
I cannot believe that a today's device with a non-bricked bootloader and working APX is totally lost and even the manufacturer will only offer a costly RMA to replace the whole mainboard!?
Best regards,
q2.

Quentin2 said:
Thanks for replying.
Yes, I did keep Vol-Down (means Vol-Left) pressed while pinching the reset button. It did not help.
I will experiment a bit more. It's not really a boot "loop" - it gets stuck at the ASUS logo and this does not change anymore. Not overnight.
So far I could only see it being recognized as USB device in APX mode. Can you give me a bit background here? I have nvflash here. The blobs are not available anywhere on the net? Or why is that all a big fuzz? I used to have a Notion Ink Adam and APX saved my life several times, but the blobs were available to everybody. Nobody has the blobs here? Or are they device-specific?
I cannot believe that a today's device with a non-bricked bootloader and working APX is totally lost and even the manufacturer will only offer a costly RMA to replace the whole mainboard!?
Best regards,
q2.
Click to expand...
Click to collapse
For the TF700 the nvflash blobs are device specific - sorry.

Damn. That was the only answer I didn't want to read
Thanks a lot. So chances are gone, only RMA could help... I will ask friendly at Asus what costs they will charge...
q2.

Update:
Reply is here.
They only want to exchange mainboard. They of course know (and it seems that this is the only thing they know) that my bootloader was unlocked, therefore this is no case of guarantee for them. I know, I wrote to them that I just want to know how much they wanna charge me to fix this issue.
But: they don't want to tell me how much. They say they do not even know which revision and what hardware is inside my tablet, not even from my serial number. And I must first send them my tablet and they will charge me 95 Euro to check what's going on. And then they will tell me how much it will cost (and according to other threads I saw prices of over 400 Euro for a mainboard change - the TF701 successor model cost 450 Euro new in store)...
I somehow feel the need to reply that if they would've put only half the energy the put into logging who has unlocked the bootloader into the fact of making APX usable as a emergency recovery (as obviously not even Asus is able to generate a working blob for my device), they would have higher customer satisfactory statistics. I still just cannot believe a today's device lacks of all recovery options after a bootloader fails for some reason - as well as I cannot understand why Koush did not display a warning in ROM manager if problems are known to the community with this specific device (I mean the problem did not arise last week and ROM manager had tenths of updates since then).
I know that in the end all was my fault. And all flashing is done on our own risk. I will have to deal with it.
Phew...

Unlucky. It should be be stickied here somewhere that ROM Manager bricks the TF700 but then there is no guarantee it would be read. It is well known on this forum but that doesn't help people that don't visit frequently.
You can replace the mainboard yourself fairly easily. Watch the you tube vids on how to do it,. That is what I would do if I was in your position.

berndblb said:
For the TF700 the nvflash blobs are device specific - sorry.
Click to expand...
Click to collapse
Is there a way to backup my blobs before I leave all stock then?
Thanx! Zeddock
Sent from my SAMSUNG-SGH-I717 using XDA Premium 4 mobile app

zeddock said:
Is there a way to backup my blobs before I leave all stock then?
Thanx! Zeddock
Sent from my SAMSUNG-SGH-I717 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=2455925&highlight=nvflash

Any Solution?
Quentin2 said:
Hi.
I own a TF700T and seems to have bricked it. Last status was: I had the latest stock ROM with root running and wanted to get a CM11 based 4.4.2 image from here. I downloaded it and used rom manager to get it installed. But the install script failed at some point and I thought the recovery might be outdated. So I used ROM Manager to update recovery... I tried CWM and TWRP option. Finally I booted up into recovery trying again to install those damn rom - I used the option to wipe all data / settings from the main menu and tried again to install the ROM which again failed (I do not remember the error message clearly). I gave up. I used the "reboot" option.
Now:
- Powering up gets me into the screen with the ASUS logo (left upper corner says "the device is unlocked"). Here it is stuck forever.
- Power + Vol-Down is same as just Power - I do not get into flashboot with those 3 small icons... I just get the ASUS logo and nothing else happens. Reset hole does not change situation. The device is pretty much "always on" now (till battery is exhausted) as long-press Power turns off and immediately on again
- Only thing that seems to work: Power + Vol-Up ends up in APX mode - my computer recognizes the device via USB at this point
Unfortunately I never did any set up to nvflash.
Do I have any chance to get this thing alive again?
Thanks a lot in advance,
q2.
Click to expand...
Click to collapse
Unfortunately I'm stuck in same boat I tried to wipe out settings completely and clockwork mode was stuck and I was able to wipe recovery with TWRP or so I thought tried to reboot into recovery got stalled and now stuck on asus screen. I'm not opposed to buying a new motherboard but I find it very hard to believe that no one has come up with a solution to flashing the mainboard with the original firmware. I'm tempted to ask asus but I know the bill will be more then the tablet. Did you find an easier solution or do I just have to swap out the mainboard?

sbdags said:
http://forum.xda-developers.com/showthread.php?t=2455925&highlight=nvflash
Click to expand...
Click to collapse
Thanx, but it seems like to backup blobs I have to do the very thing that will risk me needing backup of my blobs? ... install a custom bootloader before I have a backup?
Is this right?
Is this a safer method?
zeddock

zeddock said:
Thanx, but it seems like to backup blobs I have to do the very thing that will risk me needing backup of my blobs? ... install a custom bootloader before I have a backup?
Is this right?
Is this a safer method?
zeddock
Click to expand...
Click to collapse
That's correct. You have to flash a modified bootloader and recovery. Done correctly this is not risky at all. But if there is a single line in the instructions you are not sure you understand, you are not quite ready.
There are quite a few tutorials on flashing in fastboot on this forum. Read them.
But generating your nvflash blobs you have to do without a safety net. It's worth it though! I have become much more adventurous with my tablet since I have the blobs squared away...

berndblb said:
Done correctly this is not risky at all.
Click to expand...
Click to collapse
How do you define risk?
Flashing a bootloader (without having nvflash access) is always risky by my definition, it *can* permabrick your tablet if something goes wrong at the wrong moment. But it's the best we have.