boot loop - Nexus 7 Q&A, Help & Troubleshooting

i need help! when i was using jromflasher and wipe everything and boot loop. i only see google with white letters and black background. i did not put custom rom on the nexus 7. how can i fix this?

GiantsFan91 said:
i need help! when i was using jromflasher and wipe everything and boot loop. i only see google with white letters and black background. i did not put custom rom on the nexus 7. how can i fix this?
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sigh, you uninstalled the operating system... you can't just use the tool without flashing a custom rom i think. you seems to be able to boot into bootloader, so use this tool: http://forum.xda-developers.com/showthread.php?t=1766475 and you should be back running in no time.

Billchen0014 said:
sigh, you uninstalled the operating system... you can't just use the tool without flashing a custom rom i think. you seems to be able to boot into bootloader, so use this tool: http://forum.xda-developers.com/showthread.php?t=1766475 and you should be back running in no time.
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Click to collapse
i am able to boot into bootloader or cmw but i did not put custom rom in it. i use this tool...same happen.

you will have to flash a rom to use your phone again.. so if you have a custom recovery you can use adb to transfer a rom to your internal sd card and flash it in recovery or you you can use the toolkit to flash stock in fastboot mode

k786 said:
you will have to flash a rom to use your phone again.. so if you have a custom recovery you can use adb to transfer a rom to your internal sd card and flash it in recovery or you you can use the toolkit to flash stock in fastboot mode
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Click to collapse
how can i do adb? im not sure if the nexus 7 is on usb debugging. its really messed up.

Related

No operating system installed

I tried to install a new rom after updating TWRP 2.3.0.0. after all was complete it stuck on the boot screen. I then tried with the Nexus Root Toolkit to use a restore from backup. Same problem. I then tried to flash stock and unroot. Same problem. I then tried a number of things through TWRP from backups I had their. Same problem. At present I have no OS and I can only boot into TWRP, turn if off or look at the GOOGLE screen. I have run out of ideas and would appreciate any help offered.
If you have tried everything else (flashing a ROM zip etc.) Then you should flash the factory image from Google.
Don't use the script/batch file as that will wipe your internal storage.
Just flash system and boot.
Sent from my Nexus 7 using xda premium
Sometimes a rom takes a long time to boot for the first time, please be very patient. Also, try wiping everything from /system, and then re install a custom rom from your /sdcard partition. also make sure your roms are for the nexus 7 not galaxy nexus or other similar devices. ONE MORE THING 4.1.2 wont flash with 4.1.1 bootloader.
jmtend said:
I tried to install a new rom after updating TWRP 2.3.0.0. after all was complete it stuck on the boot screen. I then tried with the Nexus Root Toolkit to use a restore from backup. Same problem. I then tried to flash stock and unroot. Same problem. I then tried a number of things through TWRP from backups I had their. Same problem. At present I have no OS and I can only boot into TWRP, turn if off or look at the GOOGLE screen. I have run out of ideas and would appreciate any help offered.
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Click to collapse
There was a bug in TWRP V2.3.0.0 use fastboot to flash V2.3.1.0 and then reflash the rom
Sent from my BAKED Nexus
spaceman860 said:
There was a bug in TWRP V2.3.0.0 use fastboot to flash V2.3.1.0 and then reflash the rom
Sent from my BAKED Nexus
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Click to collapse
Got it working. Thanks all for your suggestions.
jmtend said:
Got it working. Thanks all for your suggestions.
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Click to collapse
How did you fix it? I have no OS and my internal SD card was erased too I don't know how to flash from fastboot
Adb push a ROM.
-Brought to you by Marino's Nexus 7-
AshleyPem28 said:
How did you fix it? I have no OS and my internal SD card was erased too I don't know how to flash from fastboot
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Click to collapse
I know many people hate the talk about toolkits but I was in the same situation and I used Wug's toolkit and it saved me. I downloaded 4.1.2 image directly from Google, as the toolkit only has 4.1.1.
I tried to return to stock on my own and it just went from bad to worse. I would of spent more time trying to fix it on my own but I was on a very tight time constraint. It will unroot your device but it is easy to root again.
Sent from my Nexus 7 using xda app-developers app
Billchen0014 said:
Sometimes a rom takes a long time to boot for the first time, please be very patient. Also, try wiping everything from /system, and then re install a custom rom from your /sdcard partition. also make sure your roms are for the nexus 7 not galaxy nexus or other similar devices. ONE MORE THING 4.1.2 wont flash with 4.1.1 bootloader.
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Click to collapse
THANK YOU the "ONE MORE THING" is all I needed to know for the same problem!

[Q]Nexus 7 screwed

So I was trying to install ubuntu and my usb fell out of the nexus and It managed to delete all my files except bootloader and TWRP Recovery manager. I have no boot or anything. When I try to flash stock via fastboot with a toolkit it fails at writing system data. I'm not quite sure what to do. Any help would be appreciated.
Its a Nexus 7 32GB 4.2.1
EDIT: So my bootloader boots. I have to do a temp flash to recovery via a nexus 7 toolkit. And all my backups are gone, and when I try to click any command in TWRP, It says it cannot mount /sys, /data/, /cache, etc.. I'm not quite sure how to go about fixing all of this.
When I try to flash stock, the bootloader freezes up and doesnt flash it.
i dont know...
But your recovery is still there.
theres still hope...
Have you tried to flash Ubuntu again?
Can you boot to recovery? I assume yes from what you say, i'd wipe everything and restore the backup i'm sure you made.
ghalalb said:
Have you tried to flash Ubuntu again?
Can you boot to recovery? I assume yes from what you say, i'd wipe everything and restore the backup i'm sure you made.
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Click to collapse
I can boot to recovery but it deleted my backups. I dont even know how it did that.
Still need help!

CWM and TWRP

Hi,
It seems that I have CWM and recovery installed on my Nexus 4. I was on TWRP previously and switched to CWM, now it seems that it is stucked.
I erased recovery in command prompt and flash it with CWM after installing stock ROM but ROM Manager still detected TWRP. How do I get rid of TWRP?
Zouk18 said:
Hi,
It seems that I have CWM and recovery installed on my Nexus 4. I was on TWRP previously and switched to CWM, now it seems that it is stucked.
I erased recovery in command prompt and flash it with CWM after installing stock ROM but ROM Manager still detected TWRP. How do I get rid of TWRP?
Click to expand...
Click to collapse
try flashing stock recovery via adb
If you reboot into recovery does CWM come up or TWRP? If it's CWM then ignore ROM Manager and continue as normal
ijustzeke said:
try flashing stock recovery via adb
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Click to collapse
So you are suggesting that I erase and flash to stock recovery via adb and then flash custom recovery again?
EddyOS said:
If you reboot into recovery does CWM come up or TWRP? If it's CWM then ignore ROM Manager and continue as normal
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Click to collapse
CWM comes up as the recovery because it's the latest one I flash. I know it might now matter but this really bugs me.
Dunno why you're using ROM Manager anyway, pointless piece of software IMO. Just flash everything manually
Mine was gone when i unrooting the device
Sent from my Nexus 4
EddyOS said:
Dunno why you're using ROM Manager anyway, pointless piece of software IMO. Just flash everything manually
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Click to collapse
I was just checking out the app, don't really use it. That was when I saw two recoveries. I erased and flashed everything via adb previously. Just really wanna know the cause and how to get rid of it.
curtzxion said:
Mine was gone when i unrooting the device
Sent from my Nexus 4
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Is there a way just to unroot but keep my ROM, kernel and data intact?
Zouk18 said:
I was just checking out the app, don't really use it. That was when I saw two recoveries. I erased and flashed everything via adb previously. Just really wanna know the cause and how to get rid of it.
Is there a way just to unroot but keep my ROM, kernel and data intact?
Click to expand...
Click to collapse
My rom, kernel, and data doesn't change, when i was unrooting the device(as i remember)
Sent from my Nexus 4
That's normal. I have it too. Just choose cwm on recovery already installed and leave it like that.
Sent from my Nexus 4 using xda premium

OS wiped accidentally from TWRP recovery

I accidentally wiped the OS from advanced wipe option. How do I get my phone to work again. I tried to operate adb sideload from recovery but it failed. I have downloaded the stock rom but I do not know how to install it.
Please help.
Thanks.
Kalaxy said:
I accidentally wiped the OS from advanced wipe option. How do I get my phone to work again. I tried to operate adb sideload from recovery but it failed. I have downloaded the stock rom but I do not know how to install it.
Please help.
Thanks.
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Click to collapse
Just flash it from custom recovery, so download it into ur phone go to recovery and simply flash it and all should be good.
Sent from my Nexus 6P using Tapatalk
Exiwolfman said:
Just flash it from custom recovery, so download it into ur phone go to recovery and simply flash it and all should be good.
Sent from my Nexus 6P using Tapatalk
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How do I download it to my phone if I cannot boot into it. Is there any way I can copy a zip file (rom) onto the phone's internal memory.?
Your phone should boot into recovery, so as long as it goes on and boots all u do u is use ur pc to move file over and flash it...
Sent from my Nexus 6P using Tapatalk
Kalaxy said:
How do I download it to my phone if I cannot boot into it. Is there any way I can copy a zip file (rom) onto the phone's internal memory.?
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Click to collapse
Boot into bootloader (hold power and system on), flash the though recovery through adb, mount your .zip,, flash your .zip through recovery. Sorry if that doesn't make sense, I've been drinking with the roommates, lol.
Edit: if that doesn't work, send me an IM and I will help you in the morning
Sent from my Huawei Nexus 6P using XDA Labs
Which state is your phone in right now? Is it bootlooping or in recovery?
Sent from my HTC 10 using Tapatalk
The same thing happened to me also! The whole /data (incl. sdcard) partition went corrupt (showed up in TWRP as eemc instead of ext4) & the /vendor failed to mount.
First I had to repair the /data partition (unfortunately the data was lost, as it repaired to a blank partition). I ended up having to go home (was at work at the time) & hook the phone up to the PC & download the ROM & transfer it onto the sdcard. I'm not entirely sure why/how this happened, but I believe it was because a corrupt vendor IMG. Although that theory doesnt include why the /data partition corrupted, it only explains why the /vendor partition failed to mount.
Fastboot flash system system.img
?
removed
I have the same issue. The problem is, that my computer will not recognize the phone in bootloader mode or in recovery mode(MTP enabled). How can install usb drivers without being able to boot into phone OS???? I've tried Nexus Toolkit with no success. Please help?
Have a look here how to load in bootloader, flash, etc.
http://forum.xda-developers.com/nexus-6p/general/guides-how-to-guides-beginners-t3206928
So I did the same thing. I'm sitting in TWRP right now but have nothing on the phone. Will I be able to reboot from TWRP into the bootloader and just use the flash-all command to get my phone to boot back up, then just go through the process of custom recovery again?
Basically I'm worried about leaving twrp without an OS. I didn't wipe bootloader did I? Also, I tried to download a ROM and just drag it to internal memory, but I can't seem to add anything to the internal memory.
dbroer91884 said:
So I did the same thing. I'm sitting in TWRP right now but have nothing on the phone. Will I be able to reboot from TWRP into the bootloader and just use the flash-all command to get my phone to boot back up, then just go through the process of custom recovery again?
Basically I'm worried about leaving twrp without an OS. I didn't wipe bootloader did I? Also, I tried to download a ROM and just drag it to internal memory, but I can't seem to add anything to the internal memory.
Click to expand...
Click to collapse
Hi... Just boot into recovery and reflash system.img from the factory image of your choice in bootloader with fastboot. Also flash the vendor image from the same factory image. Done...
Or reflash the whole package with flash all (manually is better imho). But you'll waisted time... Let your phone reboot into Android and you'll have your internal storage back.
5.1 said:
Hi... Just boot into recovery and reflash system.img from the factory image of your choice in bootloader with fastboot. Also flash the vendor image from the same factory image. Done...
Or reflash the whole package with flash all (manually is better imho). But you'll waisted time... Let your phone reboot into Android and you'll have your internal storage back.
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Click to collapse
Thats what I thought. JUst wanted to make sure I could get into bootloader still
dbroer91884 said:
So I did the same thing. I'm sitting in TWRP right now but have nothing on the phone. Will I be able to reboot from TWRP into the bootloader and just use the flash-all command to get my phone to boot back up, then just go through the process of custom recovery again?
Basically I'm worried about leaving twrp without an OS. I didn't wipe bootloader did I? Also, I tried to download a ROM and just drag it to internal memory, but I can't seem to add anything to the internal memory.
Click to expand...
Click to collapse
Yes TWRP has a reboot to bootloader option available. So you can access fastboot via bootloader to flash the necessary images. Just don't forget to re flash TWRP image again in case the stock recovery image was flashed beforehand.
The odd thing was that I did choose that option to boot to bootloader in twrp and it didn't work. I ended up having to reboot to bootloader manually. Not a big deal. All is working now, but thought that was interesting.
Kalaxy said:
I accidentally wiped the OS from advanced wipe option. How do I get my phone to work again. I tried to operate adb sideload from recovery but it failed. I have downloaded the stock rom but I do not know how to install it.
Click to expand...
Click to collapse
Exactly which partitions did you wipe? system? data? Internal Storage (userdata)? all of the above? Hopefully you did not wipe userdata (all your stuff). Were you on a stock ROM? You should be able to d/l the Google image from the same build you were on, extract system and data and fastboot flash those. Don't flash userdata. All your stuff should be there. Follow the tutorial on how to set up fastboot and selectively flash partitions.
---------- Post added at 06:49 AM ---------- Previous post was at 06:44 AM ----------
This thread got hijacked at least 3 times. Let's hope OP can find his way back.
pocholo36 said:
I have the same issue. The problem is, that my computer will not recognize the phone in bootloader mode or in recovery mode(MTP enabled). How can install usb drivers without being able to boot into phone OS???? I've tried Nexus Toolkit with no success. Please help?
Click to expand...
Click to collapse
Try this Hope you get solution to your problem of installing adb and fastboot tools in the correct manner.
I just by mistake deleted my internal storage.
I have TWRP, how do i put the ROM on there and flash it? Someone please help.
Thanks

Impossible to install a rom

Hello,
I have erased all the internal memory of the smartphone, which remains a TWRP folder. :crying:
I try to reinstaler via recovery, it goes well but after restart returns to recovery.
I want to reinstall android, how do I have to do it?
Thank you
Download the stock Google ROM and flash in fastboot.
audit13 said:
Download the stock Google ROM and flash in fastboot.
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Click to collapse
I chose the simplest. I used Nexus Root Toolkit
:good::good::good:

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