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Problems with booting process on my Xoom

Hello
I have a Motorola Xoom from Verizon, and this is the issue.
When I turn on, the tablet it's stuck in M logo screen, I already read almost any information about this issue, but still I can't use my xoom.
I already done this: the bootloader is already unlock
a) Files From MZ600 HRI39
fastboot flash boot boot.img
fastboot flash system system.img
fastboot flash recovery recovery.img
fastboot flash userdata userdata.img
fastboot erase cache
b) used RSD method
c) used recovery method too
I had used every method on this forum to recover my Xoom, and nothing seems to work, at this time I don't know what else do.
adb commands doesn't work for me, only with fastboot and RSD is visible my device.
At this time I accept any sugestions, Since apply a factory reset, or install a new Android version

[Q] [solved] Reverted from EOS to stock, now unable to update to 3.1 (green bot of !)

Hello,
I have the MZ601 (Xoom UK 3G) and had EOS Everest JB stable on it.
Now I wanted to go back to stock. I downloaded the original firmware from Motorola, flashed the img files with adb and everything was fine (I did not relock the bootloader). The first OTA went fine too, now I am on Android 3.0.1 (H.6.1.-38-1).
It now detects the next OTA (about 44 MB, 63.5.25.en.EU), downloads it, tries to install it but at about 1/3 of progress the green bot of ! appears. I reflashed the stock firmware several times now, same result.
Then I googled, flashed Tiamat CWM recovery, rooted the device and then did:
adb remount (got message: succeeded)
adb shell rm /system/recovery-from-boot.p (message: no such file or directory)
adb shell rm /system/etc/install-recovery.sh (no message, so guess it worked)
Now I have no idea what else to try. I'd like to get back to stock ICS.
edit: reflashed back to stock once more. This time I entered recovery mode before I applied the very first OTA and the green bot of ! already appears, what's wrong here?

Hi,
It looks like your problem is not big deal. Just try flashing again all the files and principally DON'T FORGET TO FLASH RECOVERY! And I don't see why wouldn't you lock bootloader , if you really wants it unlocked and go to stock ICS I'd recommend you to flash stock, lock bootloader and then you update, after you get to the version you want unlock again :thumbup:
Wish you the best luck
Any problems please give me an up!

​Thanks for your reply!
I think I flashed recovery with the specific adb command (see below), not sure, not really an expert. :/ I even wiped dalvik cache and factory reset in cwm recovery before flashing back to stock.
Here's what I did in detail when reverting to stock:
I downloaded MZ601_H.6.1-38-1_Retail_Europe.zip from the official Motorola website, extracted all files and used these commands in adb:
Code:
adb reboot bootloader
fastboot flash boot boot.img
fastboot flash system system.img
fastboot flash recovery recovery.img
fastboot flash userdata userdata.img
fastboot erase cache
Also, I noticed the green bot of ! appears after reboot when I enter recovery mode even before I flash the very first OTA (so just after flashing the stock files and reboot). Looks like recovery is somewhat broken or so?
I didn't want to relock the bootloader simply because I might want to root the device once I am back on stock ICS. Basically, I just wanted to get away from a custom ROM (Team EOS).
Would locking the bootloader make a difference for my success? According to google it doesn't but I am no expert to judge it right.

Yea, it looks like something is going wrong there...
Try downloading the files again, and then flash recovery. If you have no success try locking your BL, maybe it can works. The two times I went back to Stock I relocked my BL and had no problems to update via OTA. Then you relock your BL and use LordAIOTool to root again, which can easy your work...
Also you should try erasing system, recovery, cache and data before flashing, but it looks like what you did is fine.
Good luck

Thanks! I will give that a shot and post the result here.
By the way, that is one thing I read about and didn't dare to try yet: formatting system.
From what I read, after formatting /system the tablet will no longer be able to boot into android. In that case, how can I perform adb commands still? Afaik USB debugging has to be on but I will not be able to get into settings (due to lack of boot) and turn it on (and it will be off after reflashing afaik).

When you format system you can't boot in Android, but you can still flash things via fastboot, which uses a different protocol from adb. There was one time I had to format system to fix a cellphone, but if you don't want to try that, no worries , it may turn out without risking

I believe in order to upgrade you need to lock the BL. Once you update you can unlock it again.

Okay, downloaded the image again, this time via XDA. Suprisingly, all files were flashed in less than a min each (sometimes flasing system.img took half an hour or longer). Same result though. Since I forgot to lock the bootloader I flashed everything again after reboot:
Code:
>adb reboot bootloader
* daemon not running. starting it now on port 5037 *
* daemon started successfully *
>fastboot flash boot boot.img
sending 'boot' (8192 KB)... OKAY [ 49.293s]
writing 'boot'... OKAY [ 2.155s]
finished. total time: 51.477s
>fastboot flash system system.img
sending 'system' (262144 KB)... FAILED (remote: (00120003))
finished. total time: 1196.176s
Not sure why it failed here, worked dozens of times. So I simply decided to reflash system.img once more in the same run:
Code:
>fastboot flash system system.img
sending 'system' (262144 KB)... OKAY [ 25.391s]
writing 'system'... OKAY [ 14.744s]
finished. total time: 40.136s
Worked fine apparently, then continued from there as normal:
Code:
fastboot flash recovery recovery.img
fastboot flash userdata userdata.img
fastboot erase cache
fastboot oem lock
All went well this time, no error messages on the latest full reflash or locking bootloader. Then rebooted, and now it is stuck at the Motorola boot screen:
Code:
Failed to boot LNX 0x0004
Starting RSD mode 2
(charger information bla bla here)
Not sure why this happened and what this actually means? It won't boot up and since the bootloader is locked I can't enter recovery or anything. What do I need to do now?

Man... You forgot to flash the kernel (boot.img)!!! And it's probably appearing because of this small mistake!!! Now that you're on RSD Mode 2 you have to fix it another way... I never went to it (only went twice to mode 3), so sorry, I can't help you this time , I will search a little and see what I can do for you.

My mistake on posting, I did flash boot.img before that, corrected my previous posting.
Now I am stranded. And I can't even turn off the device on boot screen.
edit: rescued it, thanks to this posting:
Pushed power + vol up for reboot, waited 5 sec, then held vol down until fastboot appeared (kept pressing the button for about 17 sec until fastboot showed up).
Once there, I unlocked bootloader successfully again to flash all stock files. Xoom booted up bravely afterwards, phew.

Another good news. This time it also applied the 2nd OTA successfully finally! I don't know why it worked this time. Either it's because I (somehow badly) locked the bootloader and unlocked it again OR because I did the flashing this time from my laptop. On the previous attempts I had the Xoom connected via front USB on my desktop computer, maybe that wasn't a good idea after all (flashing on the laptop connection went even faster, too, about 20 sec the most for each file). In the past I used to flash from my laptop as well and never ran into issues either - should have sticked to it maybe.
I guess I won't go for custom ROMs again anytime soon, I've really had it, especially not the one I used to use. Simply not worth the hassle, considering the Xoom wasn't even faster and didn't work with virtual phone providers anymore.

Landorin said:
Another good news. This time it also applied the 2nd OTA successfully finally! I don't know why it worked this time. Either it's because I (somehow badly) locked the bootloader and unlocked it again OR because I did the flashing this time from my laptop. On the previous attempts I had the Xoom connected via front USB on my desktop computer, maybe that wasn't a good idea after all (flashing on the laptop connection went even faster, too, about 20 sec the most for each file). In the past I used to flash from my laptop as well and never ran into issues either - should have sticked to it maybe.
I guess I won't go for custom ROMs again anytime soon, I've really had it, especially not the one I used to use. Simply not worth the hassle, considering the Xoom wasn't even faster and didn't work with virtual phone providers anymore.
Click to expand...
Click to collapse
Glad you made it
Congrats!!

Maxx stuck boot looping

Hey Guys,
I rooted my device a while ago and everyday had to dismiss the OTA update for the last few months. The other night I accidentally accepted the OTA and know my phone is stuck in a bootloop when connected to power. I'm occasionally able to get into Fastboot mode for RSD to see the phone, ADB will not see the phone. When I attempt to select Recovery or Factory the phone bootloops. I have also tried House of Moto and that didn't work.I have tried flashing all the files located at sbf with no luck. In Fastboot the Device is listed as UNLOCKED with a Status Code: 1.
Any help will be greatly appreciated.
When I flash using House of Moto I get an error for the following:
gpt.bin
motoboot.img
logo.bin
boot.img
recovery.img
system.img
NON-HLOS.bin

uniqueflips said:
Hey Guys,
I rooted my device a while ago and everyday had to dismiss the OTA update for the last few months. The other night I accidentally accepted the OTA and know my phone is stuck in a bootloop when connected to power. I'm occasionally able to get into Fastboot mode for RSD to see the phone, ADB will not see the phone. When I attempt to select Recovery or Factory the phone bootloops. I have also tried House of Moto and that didn't work.I have tried flashing all the files located at sbf with no luck. In Fastboot the Device is listed as UNLOCKED with a Status Code: 1.
Any help will be greatly appreciated.
When I flash using House of Moto I get an error for the following:
gpt.bin
motoboot.img
logo.bin
boot.img
recovery.img
system.img
NON-HLOS.bin
Click to expand...
Click to collapse
Does it ever actually boot up and then just restarts? Or are you never getting to the homescreen?

no home screen
Hi,
It won't even boot loop unless it's connected to power. When it is it just boot loops, tried everything but can't get past the boot loop. Spent countless hours trying to make any progress.

try flashing TWRP from fastboot
Code:
fastboot erase recovery
fastboot flash recovery name.img
if you get into recovery try restoring a nandroid
if that doesnt work, make sure you are flashing the appropriate SBF from the update you were in teh process of taking. My bet is somehow your device got partially updated (bootloader) so you are now unable to flash the SBF you were prevously on. ie. you were on 4.2.2, and took the 4.4 update, you need to flash the SBF for 4.4, not 4.2.2

Once you get back up and running, make sure you disable the Moto OTA app using titanium or the like. That should prevent the phone from trying to take an update again.

Still no luck
Thanks everyone for the suggestions, I'm not sure which firmware it was trying to install so I installed all the firmwares available via House of Moto and still no luck. Tried performing a Full and Keep Data and still the phone will continue to boot loop. One thing I did notice during the install using House of Moto I see the following error multiple times:
(bootloader) Variable not supported!
I got this error on all 5 firmwares.
Any ideas...

uniqueflips said:
Thanks everyone for the suggestions, I'm not sure which firmware it was trying to install so I installed all the firmwares available via House of Moto and still no luck. Tried performing a Full and Keep Data and still the phone will continue to boot loop. One thing I did notice during the install using House of Moto I see the following error multiple times:
(bootloader) Variable not supported!
I got this error on all 5 firmwares.
Any ideas...
Click to expand...
Click to collapse
what version of android were you on prior to this happening. What version was the OTA attempting to update you to?

I think I was on Android 4.4 Blur_Version.19.5.3.obake_verizon.Verizon.en.US, not 100% sure what it was trying to install 4.4.4 or 4.4 19.6.3.
Tried House of Moto again and on the 4.2.2 12.15.15 and 4.4.4 I don't get the (bootloader) Variable not supported! error. The phone still boot loops.

uniqueflips said:
I think I was on Android 4.4 Blur_Version.19.5.3.obake_verizon.Verizon.en.US, not 100% sure what it was trying to install 4.4.4 or 4.4 19.6.3.
Tried House of Moto again and on the 4.2.2 12.15.15 and 4.4.4 I don't get the (bootloader) Variable not supported! error. The phone still boot loops.
Click to expand...
Click to collapse
have you tried with the latest version of RSD lite?
If so make sure you edit the XML file to remove the part about erasing userdata
lets try this too... go to sbf.droid-developers.org and download this file for the maxx "Android 4.4.4
Blur_Version.21.11.21.obake_verizon.Verizon.en.US"
Install the latest moto device manager and RSD lite, then try flashing (might erase userdata)
If that does not work, you can manually flash each file in fastboot, lmk if any of that works
last Q, do you have a motorola factory cable?

Tried with and without removing the getvar file and no luck, still stuck in an endless boot loop when connected to power. ADB still doesn't see the device even in Fastboot mode. Never flashed each file in fastboot individual doesn't that require ADB?

uniqueflips said:
Tried with and without removing the getvar file and no luck, still stuck in an endless boot loop when connected to power. ADB still doesn't see the device even in Fastboot mode. Never flashed each file in fastboot individual doesn't that require ADB?
Click to expand...
Click to collapse
no you dont use adb from fastboot, you use "fastboot"
Lets see if we can get you booted to a recovery. Download this file, save it as recovery.img in your ADB directory.
boot to fastboot and run this command to determine fastboot sees the device
Code:
fastboot devices
If you see your device, then run the next command
Code:
fastboot flash recovery recovery.img
then try to boot to recovery. post result (make sure when you highlight "recovery" in fastboot you use volume up to select it. I just made the mistake of using power and my phone wouldnt boot to recovery)

[Q] Stuck on boot screen after flashing Lollipop factory images

Hey,
I flashed the factory images for my Nexus 5 (T-Mobile) and it's stuck on the boot screen (flying dots).
I got the images from here: https://developers.google.com/android/nexus/images#hammerhead
I have fastboot and adb installed and used the sh script contained in the downloads to the flash the phone.
For reference:
Code:
fastboot flash bootloader bootloader-hammerhead-hhz12d.img
fastboot reboot-bootloader
fastboot flash radio radio-hammerhead-m8974a-2.0.50.2.21.img
fastboot reboot-bootloader
fastboot -w update image-hammerhead-lrx21o.zip
It didn't boot after about 15 minutes so I flashed it again and am another 20 minutes in now. I think I can probably flash the 4.4.4 image back (right?), but what could be wrong with Lollipop on my phone?

dont flash them flash-all, flash all the imgs individually.

I reflashed from windows 8 and it booted up real quick. Weird.

Mine got stock at boot screen. I went to recovery and factory reset fixed it.

bootloader error 0x00000000

Well, what happened is :
that i was trying to root my Transformer tf300t
and i got as far as unlocking the bootloader
so i was having trouble flashing the twrp recovery image
and i think i accidentally erased the stock recovery image
so now my tablet it's not (full bricked) still boots up but doesn't have a recovery image
and now when i boot it into bootloader mode and try to go into RCK it just gives me this
error bootloader unrecoverable 0x0000000 (in red)
how can i flash the stock ROM again if this error ?
anybody ?HELLP

daveSAPIEN said:
error bootloader unrecoverable 0x0000000(in red)
how can i flash the stock ROM again if this error ?
anybody ?HELLP
Click to expand...
Click to collapse
Please try this:
Go to Asus and dl the latest Stock. Unzipp it 2 times. You should have a blob file now in the extracted folder. Put this blob in your fastboot folder.
Open cmd and type:
fastboot -i 0x0B05 flash staging blob
Let it run. It seems that nothing is happening for about 5 Minutes. The whole thing can take up to 20 Minutes, so just stay calm and wait till it’s finished.
Now you should be back to full Stock with Stock recovery. Good luck!

THanks !
ebonit said:
Please try this:
Go to Asus and dl the latest Stock. Unzipp it 2 times. You should have a blob file now in the extracted folder. Put this blob in your fastboot folder.
Open cmd and type:
fastboot -i 0x0B05 flash staging blob
Let it run. It seems that nothing is happening for about 5 Minutes. The whole thing can take up to 20 Minutes, so just stay calm and wait till it’s finished.
Now you should be back to full Stock with Stock recovery. Good luck!
Click to expand...
Click to collapse
Thank you ... it worked i think
but i used a little different command line i used :
fastboot -i 0x0B05 flash system c:\adb\recovery.blob
now i'm still having problems trying to flash custom recovery i want to root the Tablet
what the problem seems to be for me is that i boot the the tablet (tf330t transformer 4.2.1 JB )
to fastboot mode then i get the 3 choices (RCK, Android,Wipe Data)
but when i try to flash the TWRP recovery img with Fastboot it always gives me an error saying (error cannot load img file)
is there anyway to fix this ? and does this root the tablet?

Dear daveSAPIEN can you give us more information about the file used during the flash , actually am facing the same problem as you but nothing seems to work
thank you