Database Users

[Q] Nexus 7 doesn't boot

Hello all! I'm having a problem with a Nexus 7.
This is my brother's tablet that he hasn't used in a few months. It hasn't been unlocked or rooted.
I can get to the boot screen with the android lying on it's back and the options with the volume buttons. The other info on that screen which might be pertinent:
Fastboot mode
Product name: grouper
variant - grouper
hw version - er3
bootloader version - n/a
serial number -
signing - not defined yet
lock stated - locked
When I go to recovery mode and push the power button, it says "booting failed" in the upper left. It still says Google in the middle, and has the options with the volume in the upper right, but the android is gone as is the text in the lower left.
I have adb and fastboot installed, but I can't seem to do much since the tablet is locked. I tried unlocking a few times, and it's always failed. Usually it doesn't give a reason, but one time I got this: "Failed (status read failed (Too many links))"
I've tried googling this and can't find someone with the same problem.
Anything I can try?
Thanks!

Nexus Tool Kit

rbeavers said:
Nexus Tool Kit
Click to expand...
Click to collapse
OK, I have that now, but I can't get very far. I think I need to enable debugging on the device first? How can I do that in that state it's in now?

swirv81 said:
OK, I have that now, but I can't get very far. I think I need to enable debugging on the device first? How can I do that in that state it's in now?
Click to expand...
Click to collapse
Anything else I can try? Not sure if I'm missing something with the tool kit, but I nothing I tried seemed to help.

swirv81 said:
Anything else I can try? Not sure if I'm missing something with the tool kit, but I nothing I tried seemed to help.
Click to expand...
Click to collapse
If you can get into the Bootloader, just run the below via ADB
Code:
fastboot oem unlock
Once you unlock the Bootloader you can use the "Soft Brick" Mode in the NRT to Re-flash back to stock and see if that will allow you to boot. You do not need debugging enabled to use the Nexus Root Toolkit if you use the Soft Brick mode, but you must have an unlocked bootloader.

ariesgodofwar said:
If you can get into the Bootloader, just run the below via ADB
Code:
fastboot oem unlock
Once you unlock the Bootloader you can use the "Soft Brick" Mode in the NRT to Re-flash back to stock and see if that will allow you to boot. You do not need debugging enabled to use the Nexus Root Toolkit if you use the Soft Brick mode, but you must have an unlocked bootloader.
Click to expand...
Click to collapse
I've tried unlocking a few times, but after a few minutes of it saying "unlocking" it fails.

swirv81 said:
I've tried unlocking a few times, but after a few minutes of it saying "unlocking" it fails.
Click to expand...
Click to collapse
What says "unlocking" (computer or tablet) and are you trying to do it through the Toolkit, or via command prompt ADB? I would first make sure your computer is seeing your tablet (ie. that the drivers and Fastboot are installed correctly). Do you know that they are?

ariesgodofwar said:
What says "unlocking" (computer or tablet) and are you trying to do it through the Toolkit, or via command prompt ADB? I would first make sure your computer is seeing your tablet (ie. that the drivers and Fastboot are installed correctly). Do you know that they are?
Click to expand...
Click to collapse
I was trying this with the command prompt. I could get fastboot to list the device when using that command. And the tablet and command prompt both say "unlocking" when doing that. I would assume that means the computer is seeing the tablet and everything is set up correctly?
I think I tried to unlock with the Toolkit, but I believe it told me that device needs to be in debugging mode.

Hey there, I'm having a similar problem.
My info is the same except my bootloader version is 4.18 and my lock state says it's unlocked. I tried to use the root kit but I'm having trouble with the fastboot device being detected. Driver solutions attempted were the google ones, and the pdanet ones. I can't really do the manual thing since that involves the device being recognized when plugged in, and since I can't enable usb debugging... anyways the automated drivers windows says were installed successfully so I don't really know what else to do.
Note: I do know the usb port on the tablet and computer work since when plugged in, it will show that its charging with the white battery icon.

Same issue here
I was in the process of upgrading manually from android 5.0 to 5.0.2 owing to the serious lag that came with lollipop. The OTA was taking longer and testing my patience as most apps were crashing due to lag.
Therefore decided to go for manual flashing of the image. I have never done this before. I was able to make the computer see my device by disabling mtp via storage under setting in the device. This is one thin I noticed to make the device visible to the computer.
After installing the device drivers my nexus was visible within the device manager but it couldn't be seen as an external storage until I played with the MTP. I had even unlocked the boot loader before all this.
So everything was going well and while I started to think all is well, I ran into this issue. From adb I tried to run 'flash-all.bat' from the new device image. Something went wrong somewhere - don't know what it is, but from then on, I am stuck in the fastboot screen or into recovery mode but when i try to boot the device bu hitting the power button - I get this message 'Booting failed'.
I am also trying to use NRToolkit but no use. When I connect my device it is seen in the device manager in my pc but cannot see it as a storage. Therefore when I now try to run the 'adb devices' command it cannot see my device. From what I saw initially, until I enable/disable mtp mode adb was not able to see my device to communicate.
Now when I tried NRT and installed the drivers once again, it is being detected in the device manager but when I run the driver test within NRT - I get a ADB device not found error. Within NRT all that it says is go into device setting>storage to enable it which I know but at the current status of my device in boot screen/recovery mode how can I go in to enable this. This is not helpful.
Somebody please suggest a workaround for this issue. I know I am close to the solution but not sure how to enable the MTP or at least made the NRToolkit to say 'ADB device found'.
My fastboot screen shows these details:
Fastboot mode
Product name grouper
Variant = grouper
HW Version – ER3
Bootloader version – 4.23
Baseband version – N/A
Serial number – 015d21d910141c0a
Signing – not defined yet
Lock State - unlocked
Please help.

HIFI Image Security Verify Error

Hello,
I have a Huawei P8 Lite (ALE-L21) phone with this error: FUNC 8 : HIFI Image, Error 1 Security Verify failed. I think I have tried everything to fix it but had no success, hence why I have decided to create this thread.
As you can figure out, the phone does not turn on, it only shows the huawei logo and shuts down. When pressing VOLUME UP + DOWN and POWER button, it used to show the HIFI image error screen, however when I press the key combination now, it only shows a red screen and turns off. I am able to enter fastboot and rescue mode by holding down the VOLUME DOWN button and plugging in a USB cable to the phone from a computer. Apart from that, I can't do anything else with the phone. (I do not have any software related to the phone installed (HiSuite), no backups, no nothing because the phone actually isn't mine and I have never actually played with it and androids in general.)
There are some similar threads and videos here:
https://forum.xda-developers.com/p8lite/help/stuck-rescue-mode-fastbootrescue-mode-t3648105
https://forum.xda-developers.com/p8lite/help/stuck-rescue-mode-screen-please-help-t3244872
https://forum.xda-developers.com/mate-10/how-to/how-to-huawei-mate-10-pro-standard-t3709535
https://forum.xda-developers.com/honor-5c/help/writing-recovery-failed-remote-command-t3584208
https://forum.xda-developers.com/p8lite/help/huawei-p8-blinks-red-green-green-red-t3546038
https://youtu.be/UYmDBD7t1iM
I have tried a lot of things to make the phone work again but nothing worked.
Recovery mode using HiSuite - "Your device is not supported for system recovery"
I have tried flashing different ROM's using fastboot - when I try flashing it says "FAILED - command not allowed", which I assume is beacuse the bootloader is locked?
installing a ROM using a SD card (Force update or something) - the red screen shows and the phone shuts down
Huawei Update Extractor - updating specific files e.g. boot.img, still not allowed to flash
TWRP - the same error ( not allowed )
Rollback to the previous versions using fastboot - not allowed
At some point I was able to wipe the cache on the phone, not sure if that matters anyhow.
When I am in the fastboot & rescue mode, there is a text in green saying "Phone LOCKED", which I assume means that the bootloader is locked? So, I was trying to get the bootloader unlocked, however found no success. I have also tried emailing Huawei support to get the bootloader code, however as you may know, they did not want to provide the code.
I was able to extract some information from the phone though, using these commands: https://forum.xda-developers.com/showpost.php?p=70483520&postcount=2
To get the bootloader code I have tried:
dc-unlocker - I think you need a working phone and have usb drivers installed for this to work and also I think you have to pay for this service
Kingroot + fastboot - https://forum.xda-developers.com/p8lite/general/alternative-method-unlocking-bootloader-t3799294
Emailing Huawei support for the code - they don't want to provide one
https://forum.xda-developers.com/huawei-p8/help/bootloader-unlock-unlock-code-huawei-t3792987
Does anyone have any suggestions on how to resolve the problem, or is it unsolvable? I would prefer to do it myself and not send the phone to Huawei or whoever as I would like to spend the least money possible. Also the warranty is long gone, since the phone has been bought in 2015.
Cheers

I have same issue, please anybody help

Exact same problem here, any help would be great.

HIFI Image Security Verify Error

Hello,
I have a Huawei P8 Lite (ALE-L21) phone with this error: FUNC 8 : HIFI Image, Error 1 Security Verify failed. I think I have tried everything to fix it but had no success, hence why I have decided to create this thread.
As you can figure out, the phone does not turn on, it only shows the huawei logo and shuts down. When pressing VOLUME UP + DOWN and POWER button, it used to show the HIFI image error screen, however when I press the key combination now, it only shows a red screen and turns off. I am able to enter fastboot and rescue mode by holding down the VOLUME DOWN button and plugging in a USB cable to the phone from a computer. Apart from that, I can't do anything else with the phone. (I do not have any software related to the phone installed (HiSuite), no backups, no nothing because the phone actually isn't mine and I have never actually played with it and androids in general.)
There are some similar threads and videos here:
https://forum.xda-developers.com/p8lite/help/stuck-rescue-mode-fastbootrescue-mode-t3648105
https://forum.xda-developers.com/p8lite/help/stuck-rescue-mode-screen-please-help-t3244872
https://forum.xda-developers.com/mate-10/how-to/how-to-huawei-mate-10-pro-standard-t3709535
https://forum.xda-developers.com/honor-5c/help/writing-recovery-failed-remote-command-t3584208
https://forum.xda-developers.com/p8lite/help/huawei-p8-blinks-red-green-green-red-t3546038
https://youtu.be/UYmDBD7t1iM
I have tried a lot of things to make the phone work again but nothing worked.
Recovery mode using HiSuite - "Your device is not supported for system recovery"
I have tried flashing different ROM's using fastboot - when I try flashing it says "FAILED - command not allowed", which I assume is beacuse the bootloader is locked?
installing a ROM using a SD card (Force update or something) - the red screen shows and the phone shuts down
Huawei Update Extractor - updating specific files e.g. boot.img, still not allowed to flash
TWRP - the same error ( not allowed )
Rollback to the previous versions using fastboot - not allowed
At some point I was able to wipe the cache on the phone, not sure if that matters anyhow.
When I am in the fastboot & rescue mode, there is a text in green saying "Phone LOCKED", which I assume means that the bootloader is locked? So, I was trying to get the bootloader unlocked, however found no success. I have also tried emailing Huawei support to get the bootloader code, however as you may know, they did not want to provide the code.
I was able to extract some information from the phone though, using these commands: https://forum.xda-developers.com/showpost.php?p=70483520&postcount=2
To get the bootloader code I have tried:
dc-unlocker - I think you need a working phone and have usb drivers installed for this to work and also I think you have to pay for this service
Kingroot + fastboot - https://forum.xda-developers.com/p8lite/general/alternative-method-unlocking-bootloader-t3799294
Emailing Huawei support for the code - they don't want to provide one
https://forum.xda-developers.com/huawei-p8/help/bootloader-unlock-unlock-code-huawei-t3792987
Does anyone have any suggestions on how to resolve the problem, or is it unsolvable? I would prefer to do it myself and not send the phone to Huawei or whoever as I would like to spend the least money possible. Also the warranty is long gone, since the phone has been bought in 2015.
Cheers

have you found any solution, i have same problem

Most likely the phone showning this kinds of errors is broken and can not be fixed by simple flashing operations.

Essential soft brick, any way to unlock flash from fastboot to sideload OTA?

Hello I am posting in Q&A because I'm a new XDA user, I was not allowed to post in the dev channel.
I have an Essential phone that has been working great for the past few years, no issues, and it was running standard build receiving OTA updates, until the very last update, which soft bricked the phone.
The phone was never enabled in developer mode while in Android, and now, I can't boot the phone into android at all. The only thing I can do is get into fastboot.
Fastboot state shows DEVICE STATE - locked
Any commands I try to unlock flashing, or change slots, anything at all, I get the error that the device is locked so all commands to unlock fail.
Is there any way to unlock device state from fastboot? I saw a youtube video showing a way to use a chopped USB cable to enter emergency / EDL mode for Qualcomm-based Android devices, but have not seen anyone post that this was successful with the Essential
Does anyone know of any method to be able to unlock flashing from fastboot? Or any other method to un-brick an essential? I've attempted everything, on both Mac and PC, nothing works.
On mac or PC, I can query the device in fastboot and get a response, I just can't do anything to unlock anything!!
Many thanks in advance for any suggestions!

Same problem
Same thing happened to me. Same day as you. I can get fastboot but not adb but since the device is locked I can't flash. I've only had the phone about 6 months so I contacted customer support and they offered to replace the phone.
It might be a known issue because they didn't even try to address the fact that I could get fastboot connected but not adb. They just offered to replace.

Thanks for the info! I am -at least in this case- unfortunately an early adopter. I bought two essentials at the beginning of the pre-release.
Essential support checked my serial number and said the phone was out of warranty.
Has anyone been able to force the Essential into EDL mode to recover that way? It looks like you have to latch one of the USB pins to ground, or 5V, but I haven't found any detailed instructions on how to make this work on the essential...
Thanks again
Justin

I'm sure things have changed and I'm wrong, but if you can get into the fastboot menu can't you just cycle through the options until you get to recovery and then flash an official release from Essential?
I may be thinking of LG or something but this should be possible as long as it's newer than the current software installed because it will see it as an official update and allow the flash.

Thanks but unfortunately, when I try and do that, the phone just does the same thing, it hangs forever on the initial boot screen white Android text with the circle/square logo...
That's why I've been looking into the more direct hardware version of forcing the phone into EDL mode, which is supposed to be possible with all Qualcomm based phones.
I've just not found the time yet to find a USB-C cable I'd be happy to cut in half and short the pins on! Which is why I was hoping someone might have tried this with an essential before to know if it was successful before I start trashing good cables
Thanks again for your reply!
JB

justinbaird said:
Hello I am posting in Q&A because I'm a new XDA user, I was not allowed to post in the dev channel.
I have an Essential phone that has been working great for the past few years, no issues, and it was running standard build receiving OTA updates, until the very last update, which soft bricked the phone.
The phone was never enabled in developer mode while in Android, and now, I can't boot the phone into android at all. The only thing I can do is get into fastboot.
Fastboot state shows DEVICE STATE - locked
Any commands I try to unlock flashing, or change slots, anything at all, I get the error that the device is locked so all commands to unlock fail.
Is there any way to unlock device state from fastboot? I saw a youtube video showing a way to use a chopped USB cable to enter emergency / EDL mode for Qualcomm-based Android devices, but have not seen anyone post that this was successful with the Essential
Does anyone know of any method to be able to unlock flashing from fastboot? Or any other method to un-brick an essential? I've attempted everything, on both Mac and PC, nothing works.
On mac or PC, I can query the device in fastboot and get a response, I just can't do anything to unlock anything!!
Many thanks in advance for any suggestions!
Click to expand...
Click to collapse
I have the exact same problem,
My phone is stuck on Essential log when I turned it on,
I can access Bootloader normally but the device is locked so I cannot flash it,
Recovery is corrupted, when I try to star it, it shows only the the Essential log and freeze so I can not format or wipe or sideload.
OEM Locked and unchecked
USB Debugging is unchecked
and I can't flash anything,
Did you managed to unlock it through Fastboot command or any other way ?
I wish I can just login to the recovery or unlock it so I can flash it clean,
Kindly help me if you found a way out
Thank you

Moto G6 Plus can't flash OEM Relocked

Hi, I need help with my evice, I used a script founded in a thread here to flash stock rom 8.0 oreo, but that locked the bootloader now I cant unlock it because when phone starts im stuck on oreo wizard with no wifi or data to acces oem unlock in developer settings, is there any way to skyp this wizar or to flash with locked bootloader, wherever i tried to flash another frimware i have the error mesage, Bootloader "Permission Denied".
Thanks in advance!
sorry bad spelling, is not my native lenguage.

You can skip the wizard with just giving it ok everywhere and it will eventually end
For the unlocking here's a tool to share internet from pc to your phone
https://github.com/Genymobile/gnirehtet

juampapo546 said:
You can skip the wizard with just giving it ok everywhere and it will eventually end
For the unlocking here's a tool to share internet from pc to your phone
Click to expand...
Click to collapse
Can't pass the wizard cuase it ask for internet and I can't use that tool cause it need debug to work wich I can't activate without passing the wizar, is there another way?
Thanks!

coredeing said:
Can't pass the wizard cuase it ask for internet and I can't use that tool cause it need debug to work wich I can't activate without passing the wizar, is there another way?
Thanks!
Click to expand...
Click to collapse
Did you try to unlock the bootloader via fastboot?

WoKoschekk said:
Did you try to unlock the bootloader via fastboot?
Click to expand...
Click to collapse
Yes but it says that I need to turn oem unlock on the developer options since I cannot pass the wizard I cant tur the option on. =c

Coredesing said:
Hi, I need help with my evice, I used a script founded in a thread here to flash stock rom 8.0 oreo, but that locked the bootloader now I cant unlock it because when phone starts im stuck on oreo wizard with no wifi or data to acces oem unlock in developer settings, is there any way to skyp this wizar or to flash with locked bootloader, wherever i tried to flash another frimware i have the error mesage, Bootloader "Permission Denied".
Thanks in advance!
sorry bad spelling, is not my native lenguage.
Click to expand...
Click to collapse
Even if you get past the wizard, you still wouldn't be able to re-unlock the bootloader. It would stay gray forever. The only solution now is to get your phone hard bricked so you can enter edl mode and re-unlock it. You need either a deep flash cable, or short the 2 connection JTAG points from the motherboard. I'm on the same boat, but never got to do this to confirm if it works.

mrsiri said:
Even if you get past the wizard, you still wouldn't be able to re-unlock the bootloader. It would stay gray forever. The only solution now is to get your phone hard bricked so you can enter edl mode and re-unlock it. You need either a deep flash cable, or short the 2 connection JTAG points from the motherboard. I'm on the same boat, but never got to do this to confirm if it works.
Click to expand...
Click to collapse
NO, you can pass the wizard with no internet connection, I did it several times on my evert, just keep saying yes to everything (unless you frp locked which would be weird since is not by default enabled) Once you pass the wizard use the tool I provided previously to unlock bl