4.2.1 Update error, now I can't boot. - Nexus 7 Q&A, Help & Troubleshooting

As a disclaimer I was on rooted stock 4.2, with 160 dpi. Restored backup of build.prop then went to install the system update (worked fine that way from 4.1.2 to 4.2), rebooted and almost instantly had the Android recovery logo with a red triangle and said error. Stuck on that screen, so I held the power button to turn it off, then when I tried to boot it up I just get the Nexus logo and it never boots. I went to bootloader tried to boot into recovery (clockwork) and it said it wasn't there or something.
What are my options?

Kitten Mittens said:
As a disclaimer I was on rooted stock 4.2, with 160 dpi. Restored backup of build.prop then went to install the system update (worked fine that way from 4.1.2 to 4.2), rebooted and almost instantly had the Android recovery logo with a red triangle and said error. Stuck on that screen, so I held the power button to turn it off, then when I tried to boot it up I just get the Nexus logo and it never boots. I went to bootloader tried to boot into recovery (clockwork) and it said it wasn't there or something.
What are my options?
Click to expand...
Click to collapse
A couple of things. You could boot into the bootloader and use fastboot to flash a custom recovery, then flash a ROM from there. Otherwise you could download the stock 4.2.1 images from Google and use fastboot to flash back to 100% stock and start over.

Wug's Toolkit may come in handy here if you're not comfortable or familiar with all the command line options.

Think I'm just going to flash the factory 4.2.1 image, will I be able to root 4.2.1?

Kitten Mittens said:
Think I'm just going to flash the factory 4.2.1 image, will I be able to root 4.2.1?
Click to expand...
Click to collapse
Yes.
- Sent from my US Cellular SGS3

Related

[HELP}Nexus 4 Recovery Mode Issue

Alright guys this is pretty frustrating and scaring me completely.
I unlocked the bootloader no problem. Then I wanted to flash TWRP recovery by typing in this command "fastboot flash recovery openrecovery-twrp-2.3.2.3-mako.img" so I could root.
Then when I rebooted into bootloader mode and selected recovery I got the Android laying down with the red triangle exclamation mark.
So I downloaded the Nexus 4's factory image and re-flashed the stock recovery by typing fastboot flash recovery recovery.img and the same thing happens.
I even tried booting into stock recovery by typing fastboot boot recovery recovery.img and the same thing.
Any help will be appreciated and its urgent lol.
EDIT: FIXED! Forgot to type in fastboot erase cache after flashing TWRP. Not sure if it was required but I did and all is well now.
Thanks again guys
Thanks
Edit: Another issue - I installed CWM SuperSu v0.98 via TWRP and I hit reboot. Now I see the Google logo for a while. Then the Nexus logo. It doesn't boot into the actual phone. Still stuck on the Nexus logo. Any takes folks?
The android laying down with the red triangle is the stock recovery. You usually press volume up when on that screen to get stock recovery options.
Sent from my EndeavorU using xda app-developers app
bagofcrap24 said:
The android laying down with the red triangle is the stock recovery. You usually press volume up when on that screen to get stock recovery options.
Sent from my EndeavorU using xda app-developers app
Click to expand...
Click to collapse
Ya but even before when I flashed TWRP, I couldn't even get to TWRP. I went to the bootloader mode. Pressed the vol keys till I got to Recovery.Then I pressed the power button to select it and that's when I got the red triangle with the Android laying down both on stock and TWRP recoveries even when booting into the recovery vs flashing.
evaradar said:
Ya but even before when I flashed TWRP, I couldn't even get to TWRP. I went to the bootloader mode. Pressed the vol keys till I got to Recovery.Then I pressed the power button to select it and that's when I got the red triangle with the Android laying down both on stock and TWRP recoveries even when booting into the recovery vs flashing.
Click to expand...
Click to collapse
Hmm sounds like the same boot loader problem I had with the nexus 7 and it was fixed with the 4.1.2 update
Try flashing cwm recovery I normally don't use TWRP because I never really liked it too much but see if that works.
Okay so I was able to boot temporarily into TWRP by typing fastboot boot openrecovery-twrp-2.3.2.3-mako.img. Now I'll see if I can flash it... and try booting into recovery mode.People on the Nexus 4 Dev threads and on the Paranoid Android threads recommended TWRP since it works properly with Android 4.2 vs CWM and they said TWRP is a step better.
Mods please lock thread. Thanks
evaradar said:
Alright guys this is pretty frustrating and scaring me completely.
I unlocked the bootloader no problem. Then I wanted to flash TWRP recovery by typing in this command "fastboot flash recovery openrecovery-twrp-2.3.2.3-mako.img" so I could root.
Then when I rebooted into bootloader mode and selected recovery I got the Android laying down with the red triangle exclamation mark.
So I downloaded the Nexus 4's factory image and re-flashed the stock recovery by typing fastboot flash recovery recovery.img and the same thing happens.
I even tried booting into stock recovery by typing fastboot boot recovery recovery.img and the same thing.
Any help will be appreciated and its urgent lol.
EDIT: FIXED! Forgot to type in fastboot erase cache after flashing TWRP. Not sure if it was required but I did and all is well now.
Thanks again guys
Thanks
Edit: Another issue - I installed CWM SuperSu v0.98 via TWRP and I hit reboot. Now I see the Google logo for a while. Then the Nexus logo. It doesn't boot into the actual phone. Still stuck on the Nexus logo. Any takes folks?
Click to expand...
Click to collapse
Could you please be more specific on how did you fix it?
I've got my N4 maybe a month ago, I installed the 4.2.2 OTA as soon as I got it, the I proceeded to unlock it and root it, one day someone recommended to clear the cache of the phone using the stock recovery (which I thought I had / to fix another problem that I was having) I went to fastboot and tried to access recovery, BOOM, just an android laying down with a red exclamation mark, no "no command" error at all. I downloaded CWM touch and flashed it using Nexus Root Toolkit, that worked fine, but I didn't want a custom recovery and also I needed to fix a 3G latency problem that I was having, after some reading I saw that someone recommended a full flash using the stock google image.
A couple of days I proceeded to flash the factory image, I installed it, after that I did a factory reset from android itself. After doing all that I wanted to clear the cache with the stock recovery just in case, BOOM, an an android laying down with a red exclamation mark and this time with a "no command" error. Tried the trick of holding the power and pressing the volume up, NOTHING HAPPENS!
Right now I am using CWM Touch.
Any suggestion?
Thank you.
The android with the ! Is the splash screen for stock recovery press and hold power the press volume up then release both buttons it will bring up menu
Sent from my Nexus 4
spaceman860 said:
The android with the ! Is the splash screen for stock recovery press and hold power the press volume up then release both buttons it will bring up menu
Sent from my Nexus 4
Click to expand...
Click to collapse
Already did that bro and nothing happens, options do not show up.
lsv-1 said:
Already did that bro and nothing happens, options do not show up.
Click to expand...
Click to collapse
Same thing with my phone. I flashed a custom recovery but cannot get into it. By pressing recovery mode from the bootloader, it just displays an android laying down with „!”.
petrea_86 said:
Same thing with my phone. I flashed a custom recovery but cannot get into it. By pressing recovery mode from the bootloader, it just displays an android laying down with „!”.
Click to expand...
Click to collapse
The Android laying down with the ! Is the stock recovery. You don't have a custom recovery installed
Sent from my Nexus 4
I have the same problem with the stock recovery "no command". Is there a solution to the problem ....

Stuck at X logo

I recently just picked up a nexus 4 and i'm trying to get a custom ROM on it. I updated it to 4.3 and that was fine. Went to install custom recovery and every since it will not boot! I've reverted to factory 4.3 using fastboot, and relocked it and locked it but still will not boot. It gets stuck at the X logo. Left it for an hour and won't get past it. If i install a custom recovery, it'll boot into the custom recovery no problem, but won't install root as it can't mount the SD card. I can get to fastboot mode no problem and flash stuff in fastboot but will never boot up. I'm puzzled as to what to do. I'm going to try 4.2.2 factory image here shortly and see if i can get it to take. I forgot to enable USB debugging so i think thats why i can't get custom recoveries to work. I tried pushing a ROM using ADB push but it wouldn't get there. Maybe it did as it said it did on the computer but the recovery won't read the memory. Any ideas as to what to do
UPDATE: Ok after flashing stock 4.2.2 from fastboot it boots.
UPDATE: turns out just having USB debugging was the culprit of everything. So make sure USB debugging is enabled before starting the whole process!

Stuck in bootloop: how to start over without losing Titanium backup data?

Nexus 4 on 4.4.2 stock rooted with Xposed and Matr1x kernel.
I can get to TWRP but after wiping dalvik/cache and reflashing diff kernels (problems started after flashing a new version of a custom kernel), it either gets stuck at "Starting Apps" (after it goes through the Android is upgrading applications thing) or get stuck at the kitkat booting animation.
One time I did manage to get it booted and the Titanium Backup data was still there. I'd like to avoid doing a factory reset and lose the TiBu data and have to set up everything again and lose all my data/pics.
How can I do this?
Or alternately, how can I load a stock kernel onto the device in this condition?
[edit: this is getting worse, I had the phone plugged into my PC (to keep it charged while it's stuck in bootloop or trying to get it to work) and when I pressed the vol buttons + power button to reboot to recovery, the red light came on a couple of times, and now the screen says "Download Mode, DO NOT UNPLUG the device until the process is complete"....... Sigh.
If you can still get into twrp you can use adb pull to pull the titanium backup files off your phone. not sure where titanium backup directory is but you can pull your entire sdcard with 'adb pull /sdcard/'
After that try factory reset, if you still have problems either try flash an older version of the kernel or just flash a stock image. You should still be able to get into fastboot and flash whatever.
mgs333 said:
Nexus 4 on 4.4.2 stock rooted with Xposed and Matr1x kernel.
I can get to TWRP but after wiping dalvik/cache and reflashing diff kernels (problems started after flashing a new version of a custom kernel), it either gets stuck at "Starting Apps" (after it goes through the Android is upgrading applications thing) or get stuck at the kitkat booting animation.
One time I did manage to get it booted and the Titanium Backup data was still there. I'd like to avoid doing a factory reset and lose the TiBu data and have to set up everything again and lose all my data/pics.
How can I do this?
Or alternately, how can I load a stock kernel onto the device in this condition?
[edit: this is getting worse, I had the phone plugged into my PC (to keep it charged while it's stuck in bootloop or trying to get it to work) and when I pressed the vol buttons + power button to reboot to recovery, the red light came on a couple of times, and now the screen says "Download Mode, DO NOT UNPLUG the device until the process is complete"....... Sigh.
Click to expand...
Click to collapse
Just use fastboot and flash the boot.img file. It'll replace the bad kernel with the stock one
fastboot flash boot boot.img
You can extract the boot.img from the factory image
Sent from my Nexus 5

Flashed TWRP, now can't flash back to stock recovery. Help...

I updated to Lollipop using adb and stock recovery. That worked great. Then I flashed TWRP and made a nandroid backup. I have not rooted again since I'm switching to Nexus 9. So I want to reflash stock recovery, but I didn't save it.
I have the original stock recovery from the mantaray-lrx21p factory image, but when I flash it and boot into recovery, it's just blank screen. I'm assuming the OTA update also updated recovery? Does anyone have a copy of stock recovery after the OTA Nexus 10 update I could borrow?
Thanks,
Steve
Interestingly, I find that if I flash the stock recovery from mantaray-ktu84p, then it works. So it's the stock recovery in mantaray-lrx21p that just shows blank screen...
Same issue here to? Fix
Galaxy 6s Os 6.2.8▪Ss° Pen
I think the fix is we need to get someone with the latest Lollipop patch to extract and give us the recovery.img?
When blank screen appears, press power button for few seconds until the green robot appears, then press power + volume up ( or down ). the stock recovery menu will show up
I don't get any robot when pushing power button on blank screen. After 10 secs, device reboots. Are you sure it works like this now?
Well this is strange. I started all over with ktu84p, then applied the OTA lrx21p update. After the update, the recovery still says ktu84p so it did not get updated by applying the OTA update. Is that what everyone else sees as well? If I flash the recovery.img from the lrx21p factory image, then I get the blank screen instead of robot.

Stock Lollipop boot issue

Hi,
I've decided to return to stock after using Cyanogenmod for quite a while. I used fastboot to install the stock ROM from the google developers site, but I'm getting stuck at the boot animation stage.
Others have said to lock the bootloader, but it still isn't booting.
I've tried to go into recovery, but I get an android lying on his bag with a warning triangle. Prior to this, I had ClockWorkMod recovery installed.
I've installed TWRP and that's functioning but has anyone any idea on how to get past the boot animation?
thanks
keveye said:
Hi,
I've decided to return to stock after using Cyanogenmod for quite a while. I used fastboot to install the stock ROM from the google developers site, but I'm getting stuck at the boot animation stage.
Others have said to lock the bootloader, but it still isn't booting.
I've tried to go into recovery, but I get an android lying on his bag with a warning triangle. Prior to this, I had ClockWorkMod recovery installed.
I've installed TWRP and that's functioning but has anyone any idea on how to get past the boot animation?
thanks
Click to expand...
Click to collapse
Boot into the stock recovery and do a factory reset. The dead android is the stock recovery. When you get there push vol up and the power key
Sent from my Nexus 5 using XDA Free mobile app

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