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[Q] TF101 Won't connect via USB

I'm quite confused with this one. Here's what's happened so far.
I was on AOKP Build 31 with CWM touch 5.8.2.1 and decided I want to go back to stock and start fresh. I found a mostly stock 9.2.1.17 from a thread in XDA titled "[ROM] TF101 Rooted Stock 9.2.1.17 + bootloader + modded recovery US and WW" (sorry, can't post links). I downloaded, checked the MD5, made a nandroid, wiped data/cache/Dalvik and installed the ROM. After doing that, I have been unable to get my device to connect to any computer via USB. I tried restoring my backup and also re-flashing a fresh copy of AOKP Build 31. I am able, however, to connect via ADB using TCP/IP. When I plug the device into my Windows 7 Pro, 64-bit I don't get any sort of notification or sound. When I plug the device into my Ubuntu 11.10, 64 bit I also don't have a connection showing up using the 'sudo lsusb' command. The strangest thing is that when I plug the device in the screen turns on, so clearly the USB cable is not the cause. I've tried two different Win. 7 computers, my Ubuntu box and a Fedora box (and multiple USB ports on each computer). Any suggestions?

Try this, Settings> Storage> hit the 3 dots sign at top right corner, hit USB computer connection,
Un check the MTP box and check it again. If that don't work try turning off USB debugging

Try this, Settings> Storage> hit the 3 dots sign at top right corner, hit USB computer connection,
Un check the MTP box and check it again. If that don't work try turning off USB debugging
Click to expand...
Click to collapse
Tried that on one of the Win. 7 boxes and the Ubuntu box, no success.

Have you tried reinstalling the drivers? I had to do that when I went from stock to custom rom.

This happens a lot. Something to do with the bootloader not getting flashed properly or something.
Get the full ICS ROM from Asus website and flash it.

horndroid said:
This happens a lot. Something to do with the bootloader not getting flashed properly or something.
Get the full ICS ROM from Asus website and flash it.
Click to expand...
Click to collapse
Just did that... lost root -.- stock and no usb >:/
Does anyone have any ide how i can root it now?

Get the full ICS ROM from Asus website and flash it.
Click to expand...
Click to collapse
I also tried doing this, without success. I'll try a few other things, thanks for the help though all!

You can root it (rather painfully and obscurely) by using an update.zip with the version of the firmware Razorclaw needs to work, and root in tablet and then flash in tablet. Downgrading to the required honeycomb might fix the usb too. I've never had to use ADB to do anything on my tf, aside from developing

Thing O Doom said:
You can root it (rather painfully and obscurely) by using an update.zip with the version of the firmware Razorclaw needs to work, and root in tablet and then flash in tablet. Downgrading to the required honeycomb might fix the usb too. I've never had to use ADB to do anything on my tf, aside from developing
Click to expand...
Click to collapse
How can i downgrade to honeycomb? without recovery?? and where can i find the ww version of it?

baseballfanz said:
Try this, Settings> Storage> hit the 3 dots sign at top right corner, hit USB computer connection,
Un check the MTP box and check it again. If that don't work try turning off USB debugging
Click to expand...
Click to collapse
Ive rooted a bajillion devioces and never thought to look there when my tf101 stopped connecting, ive rebooted my pc and it a hundred times
Thanks for the DOH! moment !!

no usb data. need to root -tf101

Long time listener. First time caller.
I have an issue. My tf101 lost the ability to transfer data about week ago. Meaning, its not detectable by computers or any usb device
The tablet was rooted but i returned to stock in an effort to fix the problem and lost root.
I have tried:
3 cables
4 PC's
1 linux box
The tablet charges fine and even trickle charges from usb ports
I narrowed down the problem to a partially corrupt bootloader. Or simply a bad flash(team rouges rec and revolution rom)
I think i may be able to fix the problem by flashing ClockWork recovery, but i need to get root access. Any ideas or am i just screwed?

So im screwed right?

Zone3 said:
Long time listener. First time caller.
I have an issue. My tf101 lost the ability to transfer data about week ago. Meaning, its not detectable by computers or any usb device
The tablet was rooted but i returned to stock in an effort to fix the problem and lost root.
I have tried:
3 cables
4 PC's
1 linux box
The tablet charges fine and even trickle charges from usb ports
I narrowed down the problem to a partially corrupt bootloader. Or simply a bad flash(team rouges rec and revolution rom)
I think i may be able to fix the problem by flashing ClockWork recovery, but i need to get root access. Any ideas or am i just screwed?
Click to expand...
Click to collapse
No, you're not "screwed" You could always just download an over-wifi file transfer app. I'm not sure what the best ones are on the Play Store, but I'd do you research if you're gonna drop a couple bucks on one. I haven't bothered since my Skyrocket is Samsung and I already get Kies Air.
I would suggest after flashing ClockWork recovery trying out some other ROMs and kernels and seeing if that fixes your problem. I would also highly suggest Team Win Recovery Project. It's been my favorite recovery so far, not to mention the touch screen interface is fantastic.

enterflux said:
No, you're not "screwed" You could always just download an over-wifi file transfer app. I'm not sure what the best ones are on the Play Store, but I'd do you research if you're gonna drop a couple bucks on one. I haven't bothered since my Skyrocket is Samsung and I already get Kies Air.
I would suggest after flashing ClockWork recovery trying out some other ROMs and kernels and seeing if that fixes your problem. I would also highly suggest Team Win Recovery Project. It's been my favorite recovery so far, not to mention the touch screen interface is fantastic.
Click to expand...
Click to collapse
Thanks for answering
Ive been using a combination of google drive and file expert for file transfer, but i cant flash any recovery or any rom or adbwireless because i dont have root anymore.

Did you try loading the official USB drivers?

Zone3 said:
Thanks for answering
Ive been using a combination of google drive and file expert for file transfer, but i cant flash any recovery or any rom or adbwireless because i dont have root anymore.
Click to expand...
Click to collapse
So you lost your recovery manager too?

enterflux said:
So you lost your recovery manager too?
Click to expand...
Click to collapse
Yep, and that appears to be my biggest hurdle in solving this issue.
Seems more than a few are having this issue as well

Zone3 said:
Yep, and that appears to be my biggest hurdle in solving this issue.
Seems more than a few are having this issue as well
Click to expand...
Click to collapse
I assume you can still get into APX mode? If so, I would try running this. It's what I initially used to root my TF101, and it doesn't require you to use your installed recovery. Basically it roots and installs CWM recovery from a script run from your computer. Let me know what happens.

enterflux said:
I assume you can still get into APX mode? If so, I would try running this. It's what I initially used to root my TF101, and it doesn't require you to use your installed recovery. Basically it roots and installs CWM recovery from a script run from your computer. Let me know what happens.
Click to expand...
Click to collapse
Yes, the tab can go into apx mode, but the computer wouldnt know if it was in apx. Pc doesn't know the tab exists when plugged in.

Zone3 said:
Yes, the tab can go into apx mode, but the computer wouldnt know if it was in apx. Pc doesn't know the tab exists when plugged in.
Click to expand...
Click to collapse
When plugged in to your computer and in APX mode, check Device Manager and see if there's any unrecognized devices.

enterflux said:
When plugged in to your computer and in APX mode, check Device Manager and see if there's any unrecognized devices.
Click to expand...
Click to collapse
Ive been through that. Its not a simple driver issue. Windows doesnt even acknowledge it as an "unrecognized usb device"
Linux does even list it with the lsusb command.
Same for mac.
There is no data being transfered. It doesnt even attempt usb handshaking...

Zone3 said:
Ive been through that. Its not a simple driver issue. Windows doesnt even acknowledge it as an "unrecognized usb device"
Linux does even list it with the lsusb command.
Same for mac.
There is no data being transfered. It doesnt even attempt usb handshaking...
Click to expand...
Click to collapse
Well, I'm assuming that this is no longer on stock firmware and/or too old to be still under warrantee. The only thing I can think of, unless someone else here can give you an answer, is that it may be a hardware problem and you'd have to send it in to ASUS to get it fixed.....

enterflux said:
Well, I'm assuming that this is no longer on stock firmware and/or too old to be still under warrantee. The only thing I can think of, unless someone else here can give you an answer, is that it may be a hardware problem and you'd have to send it in to ASUS to get it fixed.....
Click to expand...
Click to collapse
Did the OP found a solution to that? I have the exact same issue .

haha,, months after.....
But i am in the same situation...
a lost root and the USB dosnt work, exactly like the autor of this post...
any ideas?

sad_janus said:
haha,, months after.....
But i am in the same situation...
a lost root and the USB dosnt work, exactly like the autor of this post...
any ideas?
Click to expand...
Click to collapse
You need USB to root. I had the same issue and a new USB cable fixed it straight away.

frederuco said:
You need USB to root. I had the same issue and a new USB cable fixed it straight away.
Click to expand...
Click to collapse
hmmm, I'll try when I can get a new cable = (
but from what I've read some have tester with multiple cables and even so the USB dont work,,

sad_janus said:
hmmm, I'll try when I can get a new cable = (
but from what I've read some have tester with multiple cables and even so the USB dont work,,
Click to expand...
Click to collapse
If you have another PC you can try hat is the only other suggestion I have.

frederuco said:
If you have another PC you can try hat is the only other suggestion I have.
Click to expand...
Click to collapse
thanks
yeah, of curse i tried
but no luck. i try everything,
APX dosnt work, USB it is invisible for windows, in any way

USB not recognized + no Recovery

Hi All,
It has been a time that I unlocked my TF700t then followed the CM10 documentation to install 10.0 using CWM.
Recently I wanted to upgrade to 10.1 but it didn't work and ended with my tablet rebooting undefinitely.
I reverted then to install back the ASUS stock Rom from their website :
- I downloaded the file
- unzipped it (since it contains another zip)
- put it on a micro SD
- Booted into CWM
- installed the zip
I ended with a working tablet on the stock rom JB 4.1 but know I wanted to try again CM but I cannot access recovery anymore. I can access the bootloader but when I select RCK I get the droid laying on his back with the warning sign.
I thought I would need to flash another recovery (TWRP or other) using fastboot but now when I plug the tablet to my PC it keeps telling me that the device is not recognized. I tried to install the USB driver but it doesn't get detected.
Can anyone please help ? The tablet is working but I am afraid that it has lost some of its capabilities.
Thanks
Nacef

nacef_l said:
Hi All,
It has been a time that I unlocked my TF700t then followed the CM10 documentation to install 10.0 using CWM.
Recently I wanted to upgrade to 10.1 but it didn't work and ended with my tablet rebooting undefinitely.
I reverted then to install back the ASUS stock Rom from their website :
- I downloaded the file
- unzipped it (since it contains another zip)
- put it on a micro SD
- Booted into CWM
- installed the zip
I ended with a working tablet on the stock rom JB 4.1 but know I wanted to try again CM but I cannot access recovery anymore. I can access the bootloader but when I select RCK I get the droid laying on his back with the warning sign.
I thought I would need to flash another recovery (TWRP or other) using fastboot but now when I plug the tablet to my PC it keeps telling me that the device is not recognized. I tried to install the USB driver but it doesn't get detected.
Can anyone please help ? The tablet is working but I am afraid that it has lost some of its capabilities.
Thanks
Nacef
Click to expand...
Click to collapse
Go to your system setting and select storage. Click the 3 dots in the upper right corner and tick the box which is Media device (MTP).. Good luck..

LetMeKnow said:
Go to your system setting and select storage. Click the 3 dots in the upper right corner and tick the box which is Media device (MTP).. Good luck..
Click to expand...
Click to collapse
I just tried that but it did not work, windows is still displaying USB device not recognized.

nacef_l said:
I just tried that but it did not work, windows is still displaying USB device not recognized.
Click to expand...
Click to collapse
What Windows version are you running?
You may have to uninstall the drivers for your MTP device before installing new ones as well as disabling Windows to automatically install drivers for a new device, then manually point it to the Universal Naked Drivers folder.
Or downlaod Android SDK tool ad through it the Platform Tools and USB drivers.
BTW: When you flashed the stock firmware you lost your custom recovery. That's why you see the dead Droid - it's the stock recovery.
If you can't get fastboot to work you can use Motochopper to root your JB 4.1 stock firmware and then GooManager to install the latest TWRP recovery.
Sent from my ASUS Transformer Pad TF700T using Tapatalk 4

I have tested it on WinXP, Win7, Ubuntu and another box with Win XP. Always same thing the device is not recognized.
When I try to update the driver and point it manually to the naked drivers it cannot detect them.
I guess that even for running Motochopper I will need to get USB working to be able to root my device.
Any help please ? I am stuck with a sluggish stock mod that buries the perfs of my device.

nacef_l said:
I have tested it on WinXP, Win7, Ubuntu and another box with Win XP. Always same thing the device is not recognized.
When I try to update the driver and point it manually to the naked drivers it cannot detect them.
I guess that even for running Motochopper I will need to get USB working to be able to root my device.
Any help please ? I am stuck with a sluggish stock mod that buries the perfs of my device.
Click to expand...
Click to collapse
You do have USB debugging enabled in the Developer settings, do you?
Sent from my DROID4 using Tapatalk 2

berndblb said:
You do have USB debugging enabled in the Developer settings, do you?
Sent from my DROID4 using Tapatalk 2
Click to expand...
Click to collapse
Yes checked and double checked that

nacef_l said:
Yes checked and double checked that
Click to expand...
Click to collapse
Then it's a driver problem and it's solvable. What do you see in Device Manager under Portable Devices with your tablet connected? Did you uninstall the driver and re-install it?
Did you try to install Asus Sync (which should give you compatible drivers for the TF700)?
So many driver problems lately... there's got to be a pattern to it, but what it may be beats me :what:
Sent from my ASUS Transformer Pad TF700T using Tapatalk 4

berndblb said:
Then it's a driver problem and it's solvable. What do you see in Device Manager under Portable Devices with your tablet connected? Did you uninstall the driver and re-install it?
Did you try to install Asus Sync (which should give you compatible drivers for the TF700)?
So many driver problems lately... there's got to be a pattern to it, but what it may be beats me :what:
Sent from my ASUS Transformer Pad TF700T using Tapatalk 4
Click to expand...
Click to collapse
In the Device Manager I have nothing under Portable Devices, but under USB devices it appears an Unrecognized USB Device and a bubble notifying about an unrecognized USB device keeps popping in the task bar. Even after installing ASUS Sync it is not detected.

nacef_l said:
In the Device Manager I have nothing under Portable Devices, but under USB devices it appears an Unrecognized USB Device and a bubble notifying about an unrecognized USB device keeps popping in the task bar. Even after installing ASUS Sync it is not detected.
Click to expand...
Click to collapse
You don't connect your tablet to the PC through the dock USB port, do you?? Just had that in another thread....
If you connect the tablet directly, I'm stumped. No idea why it's not recognized...
Sent from my DROID4 using Tapatalk 2

berndblb said:
You don't connect your tablet to the PC through the dock USB port, do you?? Just had that in another thread....
If you connect the tablet directly, I'm stumped. No idea why it's not recognized...
Sent from my DROID4 using Tapatalk 2
Click to expand...
Click to collapse
I don't have a dock and I am connecting directly with the cable. I have just reflashed it to stock rom again hoping it resolves itself but nothing.
It's driving me crazy. The stock rom is really sluggish and I want to flash it to CM

Sounds like a windows driver issue to me. You need to force windows to use the right usb drivers. You normally do this by upgrading thenm in device manager. You may have a borked windows installation to fix as well..
Try the ones I have attached.

sbdags said:
Sounds like a windows driver issue to me. You need to force windows to use the right usb drivers. You normally do this by upgrading thenm in device manager. You may have a borked windows installation to fix as well..
Try the ones I have attached.
Click to expand...
Click to collapse
I have tried different windows installations with the different drivers that you provided me, still nothing. It seems to me that the device is not even sending proper ids to the system. Can it be caused by a damaged cable ?
Sent from my iPhone using Tapatalk - now Free

Had the same problem.I fixed it by uninstalling the faulty usb device. Then disconnected the usb cable. Reconnected. And the drivers installed.

nacef_l said:
I have tried different windows installations with the different drivers that you provided me, still nothing. It seems to me that the device is not even sending proper ids to the system. Can it be caused by a damaged cable ?
Click to expand...
Click to collapse
Im having the same problem and after one day of research I could not find a solution. I bought a use TF700 with a standard andriod on it, no mod, not unlocked, no root. When I connect it to the pc I get the same error, meaning just a USB Device showing up. Tried different PC's with different types of OS, no success.
Did you manage to fix the problem ? I would really appreciate some help because now I can't use that tablet in debug mode to test my android applications and that's all I bought it for. By the way, is there a adb tool that works wireless and doesn't neet root access or can I get root access without connecting my pad to my pc ?
Thanks for the help !

Well did you install adb fastboot drivers on the PCs you tried? Did you try it under Linux? Do you have the original Asus cable you connect it with?
adb over network is an option under Developer Options in Omni and Omni based roms - at least the LP roms. I don't think you can get that with an app you install. Probably needs to be baked into the kernel.

berndblb said:
Well did you install adb fastboot drivers on the PCs you tried? Did you try it under Linux? Do you have the original Asus cable you connect it with?
adb over network is an option under Developer Options in Omni and Omni based roms - at least the LP roms. I don't think you can get that with an app you install. Probably needs to be baked into the kernel.
Click to expand...
Click to collapse
First of all thanks a lot for your response, didn't think anyone would still react on that post because it's quite old. Yes I did install adb fastboot drivers, the device only shows up in the usb section saying usb device not recognized. I tried nearly every driver I found, installed the Andriod SDK, the Asus Sync Tool, the naked drivers... then removed them all (including the hidden ones) and installed just the adb fastboot -> no success. I have not tried it on linux, but on windows 7, 8 and 10. Android version is 4.2.1 and Build is 10.6.1.14.10. I now unlocked it using the apk provided by asus (version 7 , 8 did not work). Still for rooting I need pc connection, so I ordered a new cable today (cable is original Asus though).
I installed the Rom Manager and that tells me the ClockworkMod Recovery and TWRP are already installed. I also tried that recovery (power + vol) and got the same result as nacef meaning " I can access the bootloader but when I select RCK I get the droid laying on his back with the warning sign." Thing is, I don't know what the previews owner did, so it might be the reason he sold the Tablet. Can I get anywhere form that Bootloader ? Maybe boot as a Superuser and then use wireless adb to root the device ?
Thanks a lot for your help, Im feeling that I have wasted the money and the only way to get rid of that feeling is to fix the problem

Grab the Puppy Linux live CD from here: http://www.transformerforums.com/fo...t/46090-guide-adb-fastboot-linux-live-cd.html
It has adb fastboot already installed. If you don't get a connection with that one the problem would be tablet side, not Windows related.

I booted using that Puppy Linux and followed the Guide but no success. After entering "adb devices" I get the output "list of adb devices attached" and than a blank space. So I tried booting in fastboot like you described in your guide and entered "fastboot devices" but that also gives me nothing. Fastboot works though (as it's already included in that image) so I tried a bunch of other fastboot commands but that just results in "waiting for the device".
I don't know what to do now, it has something to do with the tablet itself. Im waiting for the new cable but don't think thats gonna change anything.

You are not trying to do this through the dock port, right? You are connecting the tablet directly to the PC?
The only answer I have left is either a broken cable or one of the pins in the port is bent or broken. Get a magnifying glass and check them out.

tf101 connection issues

OK guys I have an issue
I now own a tf101 the issue I'm having is a connection issue
I recently purchased my tf101 used as a bargain price as our families 2nd tablet
The lady reset to factory before I purchased
After a couple days I began looking into rooting as an option to restore some functionality to this older tablet when connecting to my computer, I wasn't receiving any notification it was plugged in .... no new device detected ... no sounds..... nothing in device manager
It charges fine... and its an official Asus cord ( least it says Asus on it)
I also got the 40 pin to USB converter and it transfers data from a flash drive to the tablet fine movies pics etc...
I tried the cord on 3 different PC's, and 2 Macs nothing
Tried downloading and installing Asus sync and naked drivers neither helped
(Gonna get my friends cord this weekend see if it does anything)
I also tried most of all of this stuff in USB debugging mode , and toggling sync tool, as well in and not in apex mode
I tried a j5 wormhole USB to USB cord from the 40 pin converter still nothing...
I've read post after post about this topic however NONE have solutions
I had a friend suggest that it may have been rooted before she factory reset it and something got corrupted...
Some other info I'm sure I'll get asked about
Firmware version IML74K.US_epad-9.2.1.27-20120615
Kernel version 2.6.39.4 [email protected]#1
Android version 4.0.3
Whenever I try to boot into any kind of recovery it shows a belly up android with red exclamation mark
Any help would be appreciated
Anyone know if I can root from usb

Same USB Connection Problem
I recently reset my tablet to "factory" and had the exact same issue. Probably searched all the same sites and found the same results you have already seen. "Buy a new cable." "Buy a new tablet."
I used Baiduroot to get temporary root and install TWRP. Unfortunately, I had to download it from a Chinese server and the app is in Chinese, so you are really guessing as to the use of the tool. I poked around till I got it.
So now I can boot into recovery, but have not yet attempted flashing a ROM such as KatKiss.

Rooted, Bootloader, and Flashed
I took courage and flashed. I now have a TF101 with Katkiss 4.4.2 and Gapps running. All done without the cable. In fact, I just plugged it into my computer and it still doesn't recognize it. This is a weird problem.
Bradley Norris said:
I recently reset my tablet to "factory" and had the exact same issue. Probably searched all the same sites and found the same results you have already seen. "Buy a new cable." "Buy a new tablet."
I used Baiduroot to get temporary root and install TWRP. Unfortunately, I had to download it from a Chinese server and the app is in Chinese, so you are really guessing as to the use of the tool. I poked around till I got it.
So now I can boot into recovery, but have not yet attempted flashing a ROM such as KatKiss.
Click to expand...
Click to collapse

Will Motherboard Replacement Solve Bricked TF300T?

Hi
TF300T JB 4.2.1
Bought new in the US in 2013 so has US SKU. Originally for my wife, but she now has an iPad Pro so I've got the hand-me-down!
Wiped it and unlocked the device successfully using the Asus V8 utility. Tried to flash TWRP from Win7 computer but something went wrong. The interface was still there, it would boot up okay but there was no sign of TWRP. Eventually, I went into fastboot and selected RCK. Nothing happened except the icon turned brown and just sat there. Then I tried a factory reset but it wouldn't have any, nor a cold boot. In desperation I turned the device off and tried to reboot. The initial "Asus" screen came up ("This device is unlocked" in top left-hand corner and the 'Nividia Tegra' logo in bottom right. No spinning circle of dots). It won't boot into fastboot, in fact the volume keys are totally unresponsive. On/off will turn off the device, but it immediately boots back to the same Asus screen. It's not recognised by the Win7 computer so I can't flash anything to it. I think I've tried everything this forum (and a few lesser ones!) could suggest, to no avail.
I believe I now have the proverbial 'bricked' tablet.
Nothing daunted, and not prepared to involve Asus support, I'm considering swapping the motherboard (I've done a couple on Windows computers) but will this bring my TF300T back to life, or is there more I need to do?
I'm no expert on the Android OS so any help from you experts would be much appreciated.
Thanks in advance.

Anyone?
I know the TF300 is a bit long in the tooth now, but all I want to know is whether a bricked one can be recovered by replacing the motherboard. There must be someone out there who has done the replacement and can advise me? Also, I apologise if this in in the wrong section, I guess it should have been in the 'Help' section, but I didn't realise until I'd posted it.

capelyddol said:
Hi
TF300T JB 4.2.1
I'm considering swapping the motherboard (I've done a couple on Windows computers) but will this bring my TF300T back to life, or is there more I need to do?
Click to expand...
Click to collapse
Of course, exchange the MB will bring back your device to life. But it is really the last option.
Firstly you have to check patiently if you can get access into your device. Therefore read mindfully this thread:
https://forum.xda-developers.com/showthread.php?t=2396072
"The solution by @Buster99 is for those who:
- flashed the wrong recovery, and wiped data
- are able to boot into recovery, but cannot flash anything
- no adb access (although, if you DO have adb access, this will still work for you...)"
Hopefully my advise will help you! Don't forget to thank @Buster99

ebonit said:
Of course, exchange the MB will bring back your device to life. But it is really the last option.
Firstly you have to check patiently if you can get access into your device. Therefore read mindfully this thread:
https://forum.xda-developers.com/showthread.php?t=2396072
"The solution by @Buster99 is for those who:
- flashed the wrong recovery, and wiped data
- are able to boot into recovery, but cannot flash anything
- no adb access (although, if you DO have adb access, this will still work for you...)"
Hopefully my advise will help you! Don't forget to thank @Buster99
Click to expand...
Click to collapse
ebonit ~ many thanks for your response. Unfortunately, I really don't think there's any way I can get access. The initial boot-up screen is all I get, in perpetual loop. The only way to shut it down is reset with vol-up., though it's possible it may be in some sort of variation of apx mode at this point as the screen is blank. I've no way of knowing as my win 7 computer only acknowledges an 'unknown device' at that point, and nothing when the initial boot screen is there. Vol-down doesn't seem to have any effect at all. Windows has already installed the drivers so won't re-install, or uninstall them as it's 'unknown'. I did once manage to get it recognised as an 'apx device' but with an '!' (not sure how I did it as I haven't been able to replicate it since!) but I don't think that helps me even if I could replicate it without the '!', Nvflash requires I have the necessary back-up files, which of course I don't. I don't know where to go from here except to replace the motherboard. Once I get the device apart I may try disconnecting the battery, vol-down, and reconnect, to try booting to recovery, but I'm not optimistic of that working.
I'll certainly be very happy to consider any other suggestions you, or anyone else, may have.
I tried Buster99's method, but as my TF300T isn't recognised by Windows that was a non-starter.
Once again, many thanks for your input.
capelyddol
(John)

capelyddol said:
ebonit ~ many thanks for your response. Unfortunately, I really don't think there's any way I can get access.
Click to expand...
Click to collapse
I'm sorry, but if you are really sure that you cannot boot into either fastboot or recovery the tablet is bricked for good!
In this case to replace the mainboard will be the last option to get the tablet back to life. There is a very good instruction with pictures by @huebinger that shows you what to do exactly: https://forum.xda-developers.com/showthread.php?t=2368372 (BTW, that's what I did many years ago!!!)
On ebay.com you may find a used one:
https://www.ebay.com/itm/GENUINE-AS...863174?hash=item54321ab206:g:lrcAAOSwjXRXcHSB

ebonit said:
I'm sorry, but if you are really sure that you cannot boot into either fastboot or recovery the tablet is bricked for good!
In this case to replace the mainboard will be the last option to get the tablet back to life. There is a very good instruction with pictures by @huebinger that shows you what to do exactly: https://forum.xda-developers.com/showthread.php?t=2368372 (BTW, that's what I did many years ago!!!)
On ebay.com you may find a used one:
https://www.ebay.com/itm/GENUINE-AS...863174?hash=item54321ab206:g:lrcAAOSwjXRXcHSB
Click to expand...
Click to collapse
ebonit ~ Thanks for the links. I checked out huebinger's and pulled my motherboard out, then bought the one you linked to on eBay. Hopefully, I didn't do any damage getting the MB out. I'm more used to the tough old internal wiring of desktop computers!
I'd already backed up the data and done a factory reset before I began my abortive attempts at rooting so hopefully I'll be starting with a clean slate once I get the new board installed. It's going to take a while to cross the pond to France, but I'll report on how it goes once it arrives.
Thanks again for your help, it's much appreciated.
John.
(capelyddol)

Hello,
My tf300t got bricked while upgrading twrp.
nothing helped, i put away the tablet, after a year i found her ... so i said to myself "why not" ?! so i ordered from ebay a motherboard, and it's work like a charm, but the tablet is old now ;0
now i want to setup a lite rom ....

mitomon said:
Hello, now i want to setup a lite rom ....
Click to expand...
Click to collapse
What do you mean?

What do you mean?
Click to expand...
Click to collapse
I was wondering that, too!
It's good to know the s/h motherboard cured his tablet's ills, though.

My replacement motherboard arrived yesterday and is installed, up, and running.
Android Ver: 4.2.1
Build No: US_epad - 10.6.1.27.5
I downloaded the v8 unlock device app and unlocked the tab.
I've downloaded:
1) djibe Transformer Pad TF300T pack v3
2)KatKiss -7.1_TF300T_029
3) open-gapps-arm-7.1-pico-20180517
I have a 32g microSD formated to FAT32 installed in the tablet.
All as per djibe89's tutorial here: https://forum.xda-developers.com/transformer-tf300t/general/guide-asus-transformer-pad-tf300t-stock-t3554744
My 'versions' are identical with djibe89's except for the BT version which is 11.38, not 10.38. Hopefully that'll not affect anything!
At this point I run into problems:
1) My USB link between the win 7 (32-bit) computer and the tablet is iffy. Sometimes it works for a while, but I frequently get the "USB device Not Recognized" with a useless MS message not worth clicking on. I'm wondering if there's a more reliable way to transfer files? Airdroid, possibly? Losing connection during file transference doesn't bear thinking about.
2)
Go to folder /Universal Naked Drivers 0.72 you unziped at start on your Desktop.
Select file android_apxusb.inf, then right click -> Install.
Force driver install and wait until a success message prompts.
Repeat operation with android_winusb.inf .
Click to expand...
Click to collapse
I tried installing these drivers by both right-click-> Install and also CMD. -to no avail. I get a Windows message saying the best drivers for the device are already installed, but the tab still isn't recognized. Oh, yes it is! Ooops, now it isn't! ad infinitum, I'm guessing.
Can anyone advise how to overcome this or I can see myself keeping the used motherboard salesmen in Mercedes for the next decade! :crying:
3) Assuming I can overcome the iffy USB problem: should I use TWRP Kang 2.8.7.2 or TWRP 3.2?
I guess that's enough problems for now. I hope ebonit or some other expert can assist with this as I really want to get this tab rooted.
Thanks
John.
(capelyddol)

capelyddol said:
My replacement motherboard arrived yesterday and is installed, up, and running.
Android Ver: 4.2.1
Build No: US_epad - 10.6.1.27.5
Click to expand...
Click to collapse
Congratulations! You did a good job. Thanks for your report.
First of all, to avoid any issues to get your device on N 7.1 Nougatella please follow exactly Tim's install instruction step by step in post #1. https://forum.xda-developers.com/transformer-tf300t/development/rom-t3453702
You need Kang TWRP as advised by Tim. Don't forget to format data through Kang TWRP before. It takes up to one hour. Then change file system to F2FS for data only no cache and system. Successfully done your device is now ready to install Rom, pico Gapps and SuperSU fresh downloaded via Tim's links there.
PS: About your USB issue take another USB port on your PC not via hub!
Good luck!

Three days with nothing from me, you'd be excused for thinking either I was dead, or my tab was! Thankfully, neither. In fact - SUCCESS!!! We're both alive and well, and for the tablet at least, performing better than ever.
TWRP installation took me two days. First, the computer (Win 7 32-bit) refused to recognize the TF300T and 'fastboot' could have been renamed 'nerverboot'. Strangely, the whole business seemed to evolve over time. Persistence was the name of the game - trying different USB ports, booting and rebooting (both tab and desktop). Eventually I found Snoop05's '15 seconds ADB Installer v1.4.3' https://forum.xda-developers.com/showthread.php?t=2588979 and with that I began to make progress...slowly!
Code:
fastboot devices
returned '???????????????' over and over again. By uplugging/plugging the cable into the tablet a few times I suddenly got a nice long string of letters and numbers. It came and went a few times but after a while seemed to stabilize till I felt ready for the big push of TWRP. I got so many error messages: 'can't find twrp.img' (I'd renamed it); 'can't open twrp.img'; 'insufficient memory', etc, etc.. Suddenly, it worked. It took just over eight seconds to download the 6.95MB. Booting into recovery was rather heart-stopping, but it came up a treat.
After that it was relatively simple to set up the TWRP (I found Djibe89's guide https://forum.xda-developers.com/transformer-tf300t/general/guide-asus-transformer-pad-tf300t-stock-t3554744 especially useful and there's a copy in the -djibe Transformer Pad TF300T pack v3' http://bit.ly/djibe-tf300t-v3.
Flashing KatKiss 7.1_TF300T_029, open_gapps-arm7.1-pico, and SuperSU-v2.82 from the microSD I'd copied them to went like a dream and before I knew it the old tab was humming with life once more. I'm a very happy chappy!
I have just two queries (so far ) 1. djibe89 mentions the file 'deviceID.apk' but Tim doesn't. Is it still necessary? I believe it's to keep Google happy, but I've no problems downloading from the Play Store, so I've not installed it as yet.
2) While installing the 'Battery Calibration' app it briefly stated that the tab wasn't rooted. I assume if I've achieved all the above, then it must be?
Now I'm going to play. No doubt I'll be back with a few more queries before too long!
Special thanks to ebonit for his help and support.

capelyddol said:
My replacement motherboard arrived yesterday and is installed, up, and running.
Android Ver: 4.2.1
Build No: US_epad - 10.6.1.27.5
I downloaded the v8 unlock device app and unlocked the tab.
I've downloaded:
1) djibe Transformer Pad TF300T pack v3
2)KatKiss -7.1_TF300T_029
3) open-gapps-arm-7.1-pico-20180517
I have a 32g microSD formated to FAT32 installed in the tablet.
All as per djibe89's tutorial here: https://forum.xda-developers.com/transformer-tf300t/general/guide-asus-transformer-pad-tf300t-stock-t3554744
My 'versions' are identical with djibe89's except for the BT version which is 11.38, not 10.38. Hopefully that'll not affect anything!
At this point I run into problems:
1) My USB link between the win 7 (32-bit) computer and the tablet is iffy. Sometimes it works for a while, but I frequently get the "USB device Not Recognized" with a useless MS message not worth clicking on. I'm wondering if there's a more reliable way to transfer files? Airdroid, possibly? Losing connection during file transference doesn't bear thinking about.
2)
I tried installing these drivers by both right-click-> Install and also CMD. -to no avail. I get a Windows message saying the best drivers for the device are already installed, but the tab still isn't recognized. Oh, yes it is! Ooops, now it isn't! ad infinitum, I'm guessing.
Can anyone advise how to overcome this or I can see myself keeping the used motherboard salesmen in Mercedes for the next decade! :crying:
3) Assuming I can overcome the iffy USB problem: should I use TWRP Kang 2.8.7.2 or TWRP 3.2?
I guess that's enough problems for now. I hope ebonit or some other expert can assist with this as I really want to get this tab rooted.
Thanks
John.
(capelyddol)
Click to expand...
Click to collapse
hi ,
you said that you succeeded to unlock the tablet ?
how ?!
i tried with unlocker v7 and 8 , i got the network error.
my tf330t is on 4.2.1.
i try hard reset, nothing helped.
i changed the mb, succeeded to root with motochopper.
please , i need help.
thanks

mitomon said:
I tried with unlocker v7 and 8 , i got the network error. My tf330t is on 4.2.1.
Click to expand...
Click to collapse
To avoid any issues please reinstall your system by doing a Buster99 https://forum.xda-developers.com/showpost.php?p=44244313&postcount=12. Be sure you have the latest firmware "WW_epad-user-10.6.1.27.5"
After that delete your Google account. Then you may unlock your device with V7.

capelyddol said:
TWRP installation took me two days. Eventually I found Snoop05's '15 seconds ADB Installer v1.4.3' https://forum.xda-developers.com/showthread.php?t=2588979 and with that I began to make progress...slowly!
Click to expand...
Click to collapse
Hope you have Kang TWRP now as required by Tim in post #1!
I'm sorry, but you never mentioned that you cannot access your Tablet via ADB. Therefore please note, the best ADB tool, every Android user may have on his PC, is "Minimal ADB & Fastboot" https://forum.xda-developers.com/showthread.php?t=2317790.
BTW, the answer to your first question is nope, you don't need it. The answer to your second one is yes the device is rooted. However check the update status of your SuperSU. Hope you did fresh download Rom, Apps and SuperSU via Tim's links in post #1 of the Nougatella thread?

I have installed Kang TWRP 2.8.7.2 as per Timduru's link. My tab was wiped before installation so all apps were fresh downloads. SuperSU was 'UPDATE-SuperSU-v2.82-20170528234214.zip' again, as per Timduru's link, as was the ROM ' KatKiss-7.1_TF300T_030.zip'. Many thanks for pointing me to 'Minimal ADB & Fastboot' which I've now installed for future use. And many thanks for all your other help. No doubt I'll be back for more!

capelyddol said:
My tab was wiped before installation so all apps were fresh downloads. Many thanks for pointing me to 'Minimal ADB & Fastboot' which I've now installed for future use. And many thanks for all your other help. No doubt I'll be back for more!
Click to expand...
Click to collapse
You are welcome! It's good to hear that you did such a good job. Using the thanks button is always greatly appreciated.
Please note, if you have any issues or you are changing the Android system, Format /data through Kang TWRP is always required. Format /data is more than wipe (you did wipe!) or factory reset. It takes up to 1 hour to be successfully. After that your system is really clean.
"Warning: formatting will remove what is stored in your internal storage, so store the rom /gapps/supersu zips onto an external storage (microSD, SD card..) or make sure you know how to push them back through adb." advised by Tim in post #1.