I did an OTA update of Lollipop on my nexus 4, it got stuck on the 'installing system update' for about an hour, so I tried to restart the phone and it loaded the new lollipop animation, but got stuck there for 20 minutes, so i restarted it and it still didn't want to load into Lollipop, so I went into the bootloader and hit recovery and it came up with 'installing system update' again and still gets stuck. when i'm in the recovery, it won't recgonise vol + and power button press to do a factory reset, it just does nothing. my computer also doesn't recgonise the device... is there anything I can do?
Thanks!
Start into bootloader and try to flash the factory image via fastboot.
boot to fastboot and flash a custom recovery. you can use twrp or cwm to do a standard factory reset and you should be fine.
i have verizon s7 edge. nougat. attempted to use odin to load engineering bootloader. succeeded and proceeded to reboot phone. then stuck in a boot loop. (tries to boot, vibrates, then tries again). tried to wipe cache partition and do factory reset w/o resolution. cant force power off but somehow stumbled into mode to boot into safe mode which also did not work. phone not rooted, was loading above to unlock (obviously). of note, did just update to nougat the day prior to doing this but phone working fine (although slow) after the update. any help appreciated.
ok...flashed factory rom and now working fine. still not sure what i did wrong to crash it initially. any ideas welcome.
Make sure your using the correct eng boot for nougat.
After fresh rom flash set up phone go to settings developer options and make sure oem unlock is checked.
Flash eng boot in ap slot.
Let phone reboot and start back up then you can run root.bat
I rooted and changed kernel on my P9 lite single sim in order to use OTG, but then went back to full stock for OTA update.
Phone downloaded it but when it reboot to install, instead of booting recovery mode started a boot screen loop.
At this point, I can just let it go out of battery and then reboot in normal mode.
FASTBOOT DOESN'T WORK, as well. Both fastboot and recovery mode are broken. Both came up in a boot screen loop.
How can I solve this?
Thx.
The problem is, if I try to update with OTA, that the phone enter in a boot screen loop. Until the battery is down.
No recovery, nor bootloader.
Hi,
I did a TWRP wipe (everything checked) to prepare for a restore to stock, but my device is now stuck at the very first "Google" screen with the pad lock icon at the bottom. How do I get it to boot?
goister said:
Hi,
I did a TWRP wipe (everything checked) to prepare for a restore to stock, but my device is now stuck at the very first "Google" screen with the pad lock icon at the bottom. How do I get it to boot?
Click to expand...
Click to collapse
So since everything was checked, that means you wiped the system partition. The device will not boot if you do that unless you flash a factory image via fastboot or new ROM via TWRP
OK, I thought wiping /system would just bring it back to factory state. 2 questions now
1. How do I get to recovery when it's always stuck at the Google screen with no adb access? Would I have to wait for the battery to run out (hence turn off), charge it for a while, then use the buttons to boot to recovery, or is there a faster way?
2. I am actually trying to revert to stock ROM (downloaded at https://developers.google.com/android/images#angler) by following step 10 of the Heisenburg guide (https://forum.xda-developers.com/nexus-6p/general/guides-how-to-guides-beginners-t3206928) which advises me to use fastboot to flash the individual images. In my case, how do I boot to fastboot?
OK, so I managed to boot to the bootloader and run the following commands as per the Heisenberg guide (using the stock MTC20L firmware)
Code:
fastboot flash bootloader C:\angler\images\bootloader-angler-angler-xx.xx.img
fastboot reboot-bootloader
fastboot flash radio C:\angler\images\radio-angler-angler-xx.xx.img
fastboot reboot-bootloader
fastboot flash boot C:\angler\images\boot.img
fastboot erase cache
(above command is unnecessary on Android 7.1.2 and above)
fastboot flash cache C:\angler\images\cache.img
(above command is unnecessary on Android 7.1.2 and above)
fastboot flash recovery C:\angler\images\recovery.img
fastboot flash system C:\angler\images\system.img
fastboot flash vendor C:\angler\images\vendor.img
Everything was successful, and I did a fastboot reboot after that.
However, my device still doesn't boot up. This time. It's boot loops for a few times before turning off.
I tried booting up to bootloader with power/vol-. Curiously, I can now only do this when cable is connected. If cable is disconnected, the orange LED just blinks once when power button is pressed, and nothing happens. Once cable is connected, then I'm able to boot up to bootloader with the button combination. I then retried the flash process again, but still no go. I noticed after fastboot reboot that the orange LED blinked a few times before rebooting and boot looping.
Kinda stuck now, any ideas?
Try booting into recovery and doing a factory reset. I've had that happen to me a few times after flashing factory images and a wipe in recovery always fixed it.
Just for future information: if at any time the device is stuck in a bootloop you can get it to robot into recovery by holding the power and volume down buttons for 10 seconds, or get it to boot into bootloader by holding power and volume up buttons for 10 seconds.
Face_Plant said:
Try booting into recovery and doing a factory reset. I've had that happen to me a few times after flashing factory images and a wipe in recovery always fixed it.
Just for future information: if at any time the device is stuck in a bootloop you can get it to robot into recovery by holding the power and volume down buttons for 10 seconds, or get it to boot into bootloader by holding power and volume up buttons for 10 seconds.
Click to expand...
Click to collapse
Thanks. Booting into stock recovery shows an exclamation sign with "no command", since I don't have TWRP anymore. Would I need to first flash TWRP before I can do a factory reset?
I just tried flashing to the same sock firmware as before the problem happened (7.1.2 N2G47W) but still same problem. I notice that after the Google logo disappears and the screen goes blank, the orange LED blinks 10 times before rebooting.
Edit: Tried factory resetting in stock recovery (by holding down power button and pressing vol+), the rebooting after factory reset. Still getting a boot loop.
OK I solved the problem. Apparently if you reboot after the flash, you need to disconnect the USB cable, else it will boot loop.
OK I solved the problem. Apparently if you reboot after the flash, you need to disconnect the USB cable, else it will boot loop.
goister said:
OK I solved the problem. Apparently if you reboot after the flash, you need to disconnect the USB cable, else it will boot loop.
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Click to collapse
brother help me! i am facing same issue
first little info abt my device.
my device was running on android nougat with twrp recovery installed but the device was not rooted.
so get back to stock and install oreo I followed every step given on http://www.androidexplained.com/nexus-6p-revert-stock/ but somehow my phone is stuck at bootloop with no recovery installed.
Please help me here.
As per the Heisenberg guide, if you don't install root (SuperSU or Magisk), TWRP won't stick, so you'll go back to stock recovery.
For me, simply unplugging the USB cable after rebooting after a flash solved my problem. For some reason, if the cable is connected during reboot, it would boot loop.
brother, somehow I managed to install twrp. but everytime I touch it 2-3 times the phone gets switched off.
then it keeps rebooting to 'Google' logo.
can you tell me what should I do now?
@goister Hi how you manage to get to recovery when it's always stuck at the Google screen with no adb access. Please I am stuck there
tommast said:
@goister Hi how you manage to get to recovery when it's always stuck at the Google screen with no adb access. Please I am stuck there
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Click to collapse
hi, did youmanage to solve this problem? I am aving the exct same problem. Disconnecting the ucb isnt working for me
Hello,
I tried to flash my S8 with TWRP with Odin. OEM and Debugging is active. After I had some failed flashes, when I now boot into revocery (VolUp+Bixby+Power) there is a blue background with a yellow warning sign and a dead android guy and "no command" but after some seconds I get into recovery mode. Even though I made factory reset and wipe I still get the error everytime I boot into recovery. When I now go to bootloader, flash TWRP with Odin I get a succesfull-message from Odin. But when I boot into recovery afterwards there is still the Android Recovery and not TWRP.
I tried different Odin and TWRP Versions and deactivatet F.reset and autostart.
Can someone help me? According to google search the blue background with the dead android guy should be gone after factory reset and wipe but its still there.
crackhead131 said:
Hello,
I tried to flash my S8 with TWRP with Odin. OEM and Debugging is active. After I had some failed flashes, when I now boot into revocery (VolUp+Bixby+Power) there is a blue background with a yellow warning sign and a dead android guy and "no command" but after some seconds I get into recovery mode. Even though I made factory reset and wipe I still get the error everytime I boot into recovery. When I now go to bootloader, flash TWRP with Odin I get a succesfull-message from Odin. But when I boot into recovery afterwards there is still the Android Recovery and not TWRP.
I tried different Odin and TWRP Versions and deactivatet F.reset and autostart.
Can someone help me? According to google search the blue background with the dead android guy should be gone after factory reset and wipe but its still there.
Click to expand...
Click to collapse
Sounds like incorrect installation of TWRP.
Did you boot up into TWRP straight after installation? not system.
Note: - USB Debugging is not required.
- Just start up odin leave default settings - In options section you can untick Auto Reboot then flash TWRP then boot into TWRP manually before starting system.