Database Users

Accidentally erased my OS. Need help getting it back.

Made a silly mistake. I was going to flash M-kernel to my device after updating to 4.2.2 and while I was in Team Win recovery I chose to wipe cache and system. I flashed the kernel and now when I select to reboot it says "No OS installed! Are you sure you wish to reboot?" I still have the file to flash 4.2.2 but don't know how I can get it on the device in it's current state. Any help would be greatly appreciated.
I tried this method here: http://forum.xda-developers.com/showthread.php?t=1667929 however I can't get Unmount/sdcard to work in the recovery menu and therefore can't push the OS file using the cmd prompt.

You may have to fastboot the system.img and boot.img into place. How did you root? Did you use root and unlock? Did you use wugs? Do you have android sdk and fastboot installed?
Btw, I did this too. I was preparing to flash a rom, did a factory reset, wipe system, and (understand I had just gotten this device at the time LOL) wiped internal storage. Which meant my backups and update.zips were gone. The nexus 7 doesn't seem to have a way to mount twrp from recovery to side load files so I just used fastboot to fix it.

hlxanthus said:
You may have to fastboot the system.img and boot.img into place. How did you root? Did you use root and unlock? Did you use wugs? Do you have android sdk and fastboot installed?
Btw, I did this too. I was preparing to flash a rom, did a factory reset, wipe system, and (understand I had just gotten this device at the time LOL) wiped internal storage. Which meant my backups and update.zips were gone. The nexus 7 doesn't seem to have a way to mount twrp from recovery to side load files so I just used fastboot to fix it.
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Click to collapse
I use Root Tool Kit to root and unlock. I have android sdk installed on the PC but not sure what fasboot is. Can you explain how to "fasboot the system.img and boot.img into place"?

If you are using the toolkit, just select your device, select flash stock firmware and connect your nexus in bootloader mode (fastboot mode, hold volume down and power when it's turned off)
Sent from my Nexus 7 running Android 4.2.2

mihahn said:
If you are using the toolkit, just select your device, select flash stock firmware and connect your nexus in bootloader mode (fastboot mode, hold volume down and power when it's turned off)
Sent from my Nexus 7 running Android 4.2.2
Click to expand...
Click to collapse
Will doing this cause me to lose everything I have on the Nexus already?

Softbrick?, stuck in fastboot

Hello,
I was attempting to update from 4.3 SlimBean to 4.4 SlimKat Weekly.
I booted into CWM Recovery, wiped system, cache, dalvik cache etc, and went to flash the rom.
The rom must have been corrupt or something, as I was unable to and received an error.
I rebooted and was stuck in fastboot.
From here, I've tried both Wug's Nexus Root toolkit, and the Skip Root toolkit.
Running the return to stock and unroot whilst in fastboot in either of them caused a crash of fastboot.exe and the Skip Root equivalent.
After a reboot Wug's allowed me to atleast run the program, but I received link errors, so tried again. This time it couldn't find it, unplug, replug. Link errors, cant find it and this repeated.
Skip also allowed me to after reboot, but gave the exact same faults.
That's as far as I've really got. I occasionaly get it to run, and it seems to work only for it to get part way in, sometimes after sending the bootloader, or on the bootloader and it can not find any devices.
For some extra info, this is Running Windows 8.1, using a USB 3.0 Front panel header and tried using default cable, samsung and kindle ones too.
I'm looking for any ideas? Worst case scenario is I can try when I'm back home at the weekend and there I have a PC with XP that I have used previously to fix this style of boot error.
Cheers,
WiiManic

Stop using toolkits, issues love to pop up for those who do
Make sure bootloader is still unlocked
If not
fastboot oem unlock
Flash latest twrp or cwm or whatever, just download the image and open cmd in this location
fastboot erase system -w
fastboot erase boot
fastboot erase recovery
fastboot flash recovery nameofrecovery.img
Now boot to new recovery
Go to advanced
Adb sideload
On PC go to ROM of choice, maybe slimbean
adb sideload nameofrom.zip
When complete
adb sideload nameofgappsoranythingelseneeded.zip
Reboot
Sent from my Nexus 4 using XDA Premium 4 mobile app

Can't boot into recovery no matter how many times it is installed

Hey XDA, Recently installed Paranoid Android coming from Chroma and it's not stuck in a boot loop. I can boot just fine every time besides the annoying corruption google warning, but no matter how many times I try to install TWRP it just won't let me boot into recovery. I'm using WugFresh's NRT kit. Can't seem to figure it out. Any suggestions?

carterl96 said:
Hey XDA, Recently installed Paranoid Android coming from Chroma and it's not stuck in a boot loop. I can boot just fine every time besides the annoying corruption google warning, but no matter how many times I try to install TWRP it just won't let me boot into recovery. I'm using WugFresh's NRT kit. Can't seem to figure it out. Any suggestions?
Click to expand...
Click to collapse
My suggestion is for you to fastboot flash the TWRP recovery image instead of using a toolkit. You cant see the inner workings of a toolkit and have no idea of what it is doing. The toolkit could be using the wrong commands to install a recovery image to your 6P. Go to www.twrp.me and search for the recovery image for your specific device and download the file. Next, rename the file to recovery.img Then, on your PC, navigate to the folder where you downloaded the TWRP image. Open a command prompt in that folder by pressing and holding the SHIFT KEY + RIGHT CLICK on your mouse and select OPEN A COMMAND WINDOW HERE. Boot to the bootloader on your device and connect it to your PC. Then type this:
fastboot flash recovery recovery.img
Then type this:
fastboot reboot bootloader
fastboot reboot recovery
Here is the link to download TWRP for your Nexus 6P
This will reboot your device to TWRP
All of this is based on the assumption that you have a working ADB installation and unlocked the bootloader and have USB Debugging turned on in DEVELOPER OPTIONS.
Sent from my Nexus 6 using XDA-Developers mobile app

Same thing, successful install and it won't open. Just shows the dead android when going to recovery.

carterl96 said:
Same thing, successful install and it won't open. Just shows the dead android when going to recovery.
Click to expand...
Click to collapse
You get the same results after fastboot flashing the TWRP image? I'd say your next step is to start fresh by fastboot flashing the factory images to return to a fully stock state. Then fastboot flash TWRP again.
Sent from my Nexus 6 using XDA-Developers mobile app

Do not boot directly into system after flashing the custom recovery.
After flashing boot into TWRP. I remember on previous devices that I owned that if you do not boot into the custom recovery after flashing it, you revert to the factory recovery.
Just a thought

tech_head said:
Do not boot directly into system after flashing the custom recovery.
After flashing boot into TWRP. I remember on previous devices that I owned that if you do not boot into the custom recovery after flashing it, you revert to the factory recovery.
Just a thought
Click to expand...
Click to collapse
I thought about that too. What is probably happening is his custom recovery is being patched by the ROM each time he boots into recovery. Thanks for picking up on that. I forgot to include that in my last post.
Sent from my Nexus 6 using XDA-Developers mobile app

tech_head said:
Do not boot directly into system after flashing the custom recovery.
After flashing boot into TWRP. I remember on previous devices that I owned that if you do not boot into the custom recovery after flashing it, you revert to the factory recovery.
Just a thought
Click to expand...
Click to collapse
That's correct. After flashing TWRP the next step is reboot into the bootloader using the volume keys and power key , then from there boot into recovery using the volume keys and power key, then the phone can be rebooted from TWRP into Android and then after that TWRP should stick.

If the boot image is not patched, the ROM will overwrite TWRP once you reboot. flashing latest SU from TWRP will prevent this.

Thanks for all the replies guys! All the advice combined got it to work. I did some more research and found that Paranoid doesn't actually come preprooted like all the other roms I've been used to. So using the tool kit I just had it root it with the latest SuperSu and also flash a custom recovery. It has booted into TWRP no problems now a few times. Hopefully it will stay like this. Will keep everyone posted and appreciate the advice. Thanks XDA!

re-installing stock recovery on Nexus 6P

I installed TWRP custom recovery on my Nexus 6P. I was able to boot into it ONCE. When i next tried to enter Recovery, i get a screen showing the Android Robot and the following statement: NO COMMAND
I tried to re-install TWRP using adb twice, but the result is the same.
How can i either fix TWRP, or re-install the stock recovery
I am basically a beginner here, so any help would be appreciated

If you installed the stock system image and then booted into it, it likely automatically reinstalled stock recovery also. I don't know why it does that, but it does. This is why I usually just reinstall TWRP again after each monthly update is completed.
You should use fastboot to install the images, not adb. The command should look like:
fastboot flash recovery twrp.img

I think i just worded it wrong - I used the above command (fastboot flash recovery twrp.img) to install twrp, and then, when i couldn't get back into recovery (Power - Volume Up combo just lest to screen that stated "No Command".), i used the fastboot flash recovery twrp.imp twice to try to re-install TWRP, but it didn't work
I also downloaded the latest stock Oreo ROM, copied the recovery.img file, and used fastboot.flash.recovery.img to try to re-install the stock recovery, but that didn't work either
The once time that TWRP work, it asked it I wanted to use TWRP is read only, to twice i selected NO (don't know if this matters)
Any other suggestions to fix TWPR, or re-install the stock recovery image???

When you say it didn't work, can you expand on that? Was there an error or anything?

hmodiano said:
I think i just worded it wrong - I used the above command (fastboot flash recovery twrp.img) to install twrp, and then, when i couldn't get back into recovery (Power - Volume Up combo just lest to screen that stated "No Command".), i used the fastboot flash recovery twrp.imp twice to try to re-install TWRP, but it didn't work
I also downloaded the latest stock Oreo ROM, copied the recovery.img file, and used fastboot.flash.recovery.img to try to re-install the stock recovery, but that didn't work either
The once time that TWRP work, it asked it I wanted to use TWRP is read only, to twice i selected NO (don't know if this matters)
Any other suggestions to fix TWPR, or re-install the stock recovery image???
Click to expand...
Click to collapse
If you want TWRP to stick, you need to flash either SuperSU or magisk. The Android with the exclamation mark is what stock recovery looks like.
Once you have TWRP installed and wish to keep it, you don't need to flash stock recovery in the monthly update. Just boot into TWRP after flashing update and root again.

chaoticyeshua said:
When you say it didn't work, can you expand on that? Was there an error or anything?
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Click to collapse
When the phone is turned on, it never progresses beyond the first screen. No error codes, it just does not proceed to boot up.
I had to buy a new phone (need it for business, but i given up on trying to install Resurrection Remix on the Nexus 6P, which was the reason I was trying to install TWPR and SuperSU. So far, I have only accomplished turning the phone into a brick door stop!!!

hmodiano said:
When the phone is turned on, it never progresses beyond the first screen. No error codes, it just does not proceed to boot up.
I had to buy a new phone (need it for business, but i given up on trying to install Resurrection Remix on the Nexus 6P, which was the reason I was trying to install TWPR and SuperSU. So far, I have only accomplished turning the phone into a brick door stop!!!
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Click to collapse
Use Magisk it's the better solution for root. Never had boot up issues with it just stock you have to boot once through before flashing. Custom ROMs you can flash right away.

Nexus 6p not booting in any ways(unlocked bootloader)

my nexus 6p is not booting into rom, recovery (stock and custom).
i have a unlocked bootloader, flashed custom recovery(twrp) by fastboot but can't get in to twrp as i wanted to flash blod patch to use 4cores to work.
i tried flashing stock images of MM, Nougat, Oreo using platform tools by google but getting an error like see in the attachment:crying:.
i tried it with fastboot by manually entering commands it will flash but not use still bootlooping.
i tried toolkits like NRT & all in one toolkit by XDA member this toolkits can flash stock rom successfully but cant get boot into system, stock recovery.
help me with your answers. my status is "unlocked bootloader, fastboot working, can access bootloader but can't get into recovery from it".
getting couldn't parse partition size 0x when booting boot img through platform tools.
tell me if i did any mistake. Thank you.

You tried stock images. Does that include factory images? That erases and reflashes quite literally everything (bootloader, recovery, system, etc.)
Find them here for 6P: https://developers.google.com/android/images#angler

Santhosh Jangamgari said:
my nexus 6p is not booting into rom, recovery (stock and custom).
i have a unlocked bootloader, flashed custom recovery(twrp) by fastboot but can't get in to twrp as i wanted to flash blod patch to use 4cores to work.
i tried flashing stock images of MM, Nougat, Oreo using platform tools by google but getting an error like see in the attachment:crying:.
i tried it with fastboot by manually entering commands it will flash but not use still bootlooping.
i tried toolkits like NRT & all in one toolkit by XDA member this toolkits can flash stock rom successfully but cant get boot into system, stock recovery.
help me with your answers. my status is "unlocked bootloader, fastboot working, can access bootloader but can't get into recovery from it".
getting couldn't parse partition size 0x when booting boot img through platform tools.
tell me if i did any mistake. Thank you.
Click to expand...
Click to collapse
You didn't mention which custom recovery you flashed. Did you try the one in this thread? https://forum.xda-developers.com/t/...-death-blod-workaround-flashable-zip.3819515/
If you did and you still can't get into it, your device is likely dead from the BLOD. But to make sure you have the BLOD, flash the latest factory image first (Dec. 2018) with the latest platform tools to see if it boots... https://developer.android.com/studio/releases/platform-tools

Lughnasadh said:
You didn't mention which custom recovery you flashed. Did you try the one in this thread? https://forum.xda-developers.com/t/...-death-blod-workaround-flashable-zip.3819515/
If you did and you still can't get into it, your device is likely dead from the BLOD. But to make sure you have the BLOD, flash the latest factory image first (Dec. 2018) with the latest platform tools to see if it boots... https://developer.android.com/studio/releases/platform-tools
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Click to collapse
firstly i already cant boot into stock recovery from my bootloader i'm on stock os 8.1.
and now i've flashed twrp for angler from twrp website but cant boot into custom recovery too.
now i've flashed twrp image of 4cores but still can't get into recovery.
so what's the problem of this phone if my mobile cant get even into twrp i can't do blod patch if we think my device is suffering from blod issue.
do you think it may be the problem of hardware like ram,emmc, or the SD 810?

Santhosh Jangamgari said:
firstly i already cant boot into stock recovery from my bootloader i'm on stock os 8.1.
and now i've flashed twrp for angler from twrp website but cant boot into custom recovery too.
now i've flashed twrp image of 4cores but still can't get into recovery.
so what's the problem of this phone if my mobile cant get even into twrp i can't do blod patch if we think my device is suffering from blod issue.
do you think it may be the problem of hardware like ram,emmc, or the SD 810?
Click to expand...
Click to collapse
As I said in my previous post, if you can't boot into the 4core custom recovery, your device is likely dead because of the BLOD, unfortunately. If you are on stock with nothing else on your phone that might be preventing you from booting (e.g. mods, Substratum overlays, etc.) there's not much else you can do.

Is your device recognized in fastboot?

marianodelfino said:
Is your device recognized in fastboot?
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Click to collapse
Hi, I am havin same problem as the user above....I am on stock 7.1.2 right now. Unable to boot into TWRP, i flashed twrp-3.2.1-0-fbe-4core-angler.img and then entered recovery from bootloader screen. nothing! i also tried to do a temporary boot to my recovery via fastboot command. didn't work! I dont think my phone is that dead...but I don't see why it isnt booting into twrp...i did the flash all of stock firmware from the Google website. Any assistance? Currently I have a Pixel 2 thats not working, so i thought I would try to revive the 6P, but no luck so far.

DaKoin said:
Hi, I am havin same problem as the user above....I am on stock 7.1.2 right now. Unable to boot into TWRP, i flashed twrp-3.2.1-0-fbe-4core-angler.img and then entered recovery from bootloader screen. nothing! i also tried to do a temporary boot to my recovery via fastboot command. didn't work! I dont think my phone is that dead...but I don't see why it isnt booting into twrp...i did the flash all of stock firmware from the Google website. Any assistance? Currently I have a Pixel 2 thats not working, so i thought I would try to revive the 6P, but no luck so far.
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Click to collapse
thanks but no assistance required as i have sold it to another nexus 6p user for using it's spare parts.