[GUIDE] Nexus 7 - Factory Image Restore

[2defmouze]

Re: [GUIDE] Factory Image Restore for your Nexus 7

Hi guys,
trying to flash the factory image

c:\android-sdk\platform-tools>fastboot flash bootloader bootloader-grouper-3.34.img
sending 'bootloader' <2072KB> ...
FAILED <comand write failed <Unknown error>>

and started to have this message on tablet 'Neither USP nor CAC partitions found'

please help

Try redownloading the images again, then starting the process from scratch, making sure to include the erase commands in Step 6 as well, considering the partitions error I'd say you want to make sure that gets done.

Sent from my Galaxy Nexus using Tapatalk 2

 

[airb0rne]

Re: [GUIDE] Factory Image Restore for your Nexus 7

Hi guys,
trying to execute

fastboot flash bootloader bootloader-grouper-3.34.img

getting the next error

FAILED <remote:Bootloader is locked.>

I have used

fastboot oem unlock

but have the next error

FAILED <remote:<Unknown error code >>

Used Nexus Root Toolkit and Nexus 7 ToolKit but without success to unlock bootloader.

I don't know if in Settings was USB Debuging set to ON

please help

 

[sicario666]

Re: [GUIDE] Factory Image Restore for your Nexus 7

Hi guys,
trying to execute

fastboot flash bootloader bootloader-grouper-3.34.img

getting the next error

FAILED <remote:Bootloader is locked.>

I have used

fastboot oem unlock

but have the next error

FAILED <remote:<Unknown error code >>

Used Nexus Root Toolkit and Nexus 7 ToolKit but without success to unlock bootloader.

I don't know if in Settings was USB Debuging set to ON

please help

Do you have the correct drivers installed?

S3N7 from... Fugggit about it!

 

[dmmarck]

Re: [GUIDE] Factory Image Restore for your Nexus 7

Hi guys,
trying to execute

fastboot flash bootloader bootloader-grouper-3.34.img

getting the next error

FAILED <remote:Bootloader is locked.>

I have used

fastboot oem unlock

but have the next error

FAILED <remote:<Unknown error code >>

Used Nexus Root Toolkit and Nexus 7 ToolKit but without success to unlock bootloader.

I don't know if in Settings was USB Debuging set to ON

please help

USB debugging doesn't matter for fastboot.

Try using a sudo in front of it?

 

[2defmouze]

Re: [GUIDE] Factory Image Restore for your Nexus 7

Hi guys,
trying to execute

fastboot flash bootloader bootloader-grouper-3.34.img

getting the next error

FAILED <remote:Bootloader is locked.>

I have used

fastboot oem unlock

but have the next error

FAILED <remote:<Unknown error code >>

Used Nexus Root Toolkit and Nexus 7 ToolKit but without success to unlock bootloader.

I don't know if in Settings was USB Debuging set to ON

please help

When did the bootloader become locked? That was not the issue on your last attempt, right?

Was is unlocked previously, and if so how did you unlock it.. Using the fastboot command or a toolkit?

Sent from my Galaxy Nexus using Tapatalk 2

 

[airb0rne]

Re: [GUIDE] Factory Image Restore for your Nexus 7

I never unlock bootloader before, I used Nexus 7 just 1 day and tablet start freeze, I hold Power button. After that I see just Google Logo

 

[2defmouze]

Re: [GUIDE] Factory Image Restore for your Nexus 7

I never unlock bootloader before, I used Nexus 7 just 1 day and tablet start freeze, I hold Power button. After that I see just Google Logo

I see.. To be honest then, if you never unlocked or hacked it and you just had problems occur on their own, your first instinct should be to do a factory reset from the settings menu. If you can't boot up at all, and waited a good amount of time, I would try to exchange the tablet. More likely you have a hardware failure, and unlocking to try and flash these images won't help.

Sent from my Galaxy Nexus using Tapatalk 2

 

[dmmarck]

Re: [GUIDE] Factory Image Restore for your Nexus 7

I never unlock bootloader before, I used Nexus 7 just 1 day and tablet start freeze, I hold Power button. After that I see just Google Logo

Did you put it into the bootloader/fastboot mode first?

 

[airb0rne]

Re: [GUIDE] Factory Image Restore for your Nexus 7

Did you put it into the bootloader/fastboot mode first?

what did you mean?

 

[dmmarck]

Re: [GUIDE] Factory Image Restore for your Nexus 7

what did you mean?

When you put those commands in, was your device at the bootloader or fastboot mode? If not, the commands won't work.

Sent from my Galaxy Nexus using Android Central Forums

 

[airb0rne]

Re: [GUIDE] Factory Image Restore for your Nexus 7

When you put those commands in, was your device at the bootloader or fastboot mode? If not, the commands won't work.

Yes, the device was in the fastboot mode, the command like 'fastboot devices' and 'fastboot reboot-bootloader' it's work

 

[simplyky]

Re: [GUIDE] Factory Image Restore for your Nexus 7

Hello everyone,

I'm having some trouble with a bricked nexus 7. However I am able to access fastboot mode. If I turn on the device it stays at the google logo with options to start/restart bootloader/recovery mode/power off. Nothing happens if I press start. Recovery mode will not work and will show android with a red sign. I am however able to restart bootloader and turn off the device.

I tried the tutorial and it failed at step 6. fastboot erase recovery. This text will show up on the N7 "Neither USP nor CAC partitions found"
And I've also found out that my device is not recognized with command :adb devices ( no serial )

Prior to this I rooted and unlocked with "nexus 7 toolkit" from: [Google Nexus 7 TOOLKIT V2.0.0] Drivers, Backup, Unlock, Root, CWM, Flash + MUCH MORE - xda-developers.
I also flashed custom rom: AOKP JB-build 2
The problem started when I installed aTorrent app and wanted to download 2 files. The N7 froze during the download and I rebooted the device. After trying to use the app again and freezing the N7. It would be in a bootloop after rebooting

Is there any hope for my N7??

 

[dmmarck]

Re: [GUIDE] Factory Image Restore for your Nexus 7

Hello everyone,

I'm having some trouble with a bricked nexus 7. However I am able to access fastboot mode. If I turn on the device it stays at the google logo with options to start/restart bootloader/recovery mode/power off. Nothing happens if I press start. Recovery mode will not work and will show android with a red sign. I am however able to restart bootloader and turn off the device.

I tried the tutorial and it failed at step 6. fastboot erase recovery. This text will show up on the N7 "Neither USP nor CAC partitions found"
And I've also found out that my device is not recognized with command :adb devices ( no serial )

Prior to this I rooted and unlocked with "nexus 7 toolkit" from: [Google Nexus 7 TOOLKIT V2.0.0] Drivers, Backup, Unlock, Root, CWM, Flash + MUCH MORE - xda-developers.
I also flashed custom rom: AOKP JB-build 2
The problem started when I installed aTorrent app and wanted to download 2 files. The N7 froze during the download and I rebooted the device. After trying to use the app again and freezing the N7. It would be in a bootloop after rebooting

Is there any hope for my N7??

Sounds like you need to install the drivers.

Sent from my Overly Suspicious Robotic Grouper

 

[2defmouze]

Re: [GUIDE] Factory Image Restore for your Nexus 7

Hello everyone,

I'm having some trouble with a bricked nexus 7. However I am able to access fastboot mode. If I turn on the device it stays at the google logo with options to start/restart bootloader/recovery mode/power off. Nothing happens if I press start. Recovery mode will not work and will show android with a red sign. I am however able to restart bootloader and turn off the device.

I tried the tutorial and it failed at step 6. fastboot erase recovery. This text will show up on the N7 "Neither USP nor CAC partitions found"
And I've also found out that my device is not recognized with command :adb devices ( no serial )

Prior to this I rooted and unlocked with "nexus 7 toolkit" from: [Google Nexus 7 TOOLKIT V2.0.0] Drivers, Backup, Unlock, Root, CWM, Flash + MUCH MORE - xda-developers.
I also flashed custom rom: AOKP JB-build 2
The problem started when I installed aTorrent app and wanted to download 2 files. The N7 froze during the download and I rebooted the device. After trying to use the app again and freezing the N7. It would be in a bootloop after rebooting

Is there any hope for my N7??

Sounds like you need to install the drivers.

Sent from my Overly Suspicious Robotic Grouper

Did you receive a response with Step 5 (fastboot devices)? That would confirm if the drivers are correctly installed and everything is configured. As you were able to use the toolkit you mentioned to unlock and root, did you try just using it to restore the factory images? I know Wug's has the option, could be worth a shot if fastboot commands are giving you trouble: http://forums.androidcentral.com/ve...s-root-toolkit-v1-5-3-updated-08-18-12-a.html

 

[simplyky]

Re: [GUIDE] Factory Image Restore for your Nexus 7

Thanks for the reply guys. I tried step 5 and it showed a serial somehow. This time it failed at step 7 writing bootloader (bad parameter)

 

[2defmouze]

Re: [GUIDE] Factory Image Restore for your Nexus 7

Thanks for the reply guys. I tried step 5 and it showed a serial somehow. This time it failed at step 7 writing bootloader (bad parameter)

I would try it a few times. If it keeps failing try to include a screenshot so I can see exactly what's happening.

 

[simplyky]

Re: [GUIDE] Factory Image Restore for your Nexus 7

I would try it a few times. If it keeps failing try to include a screenshot so I can see exactly what's happening.

I tried a couple of times and it ends up with

I've also tried wugs toolkit

 

[2defmouze]

Re: [GUIDE] Factory Image Restore for your Nexus 7

I tried a couple of times and it ends up withView attachment 38532

I've also tried wugs toolkit View attachment 38534

Looks like you're making progress... Try unzipping the main image file, and taking the parts which aren't flashing (boot and recovery are going in your second screenshot, but system and whatever comes after are not) and doing them manually, using:

fastboot flash system system.img

etc...

Sometimes just doing them one by one will get it going.

 

[airb0rne]

Re: [GUIDE] Factory Image Restore for your Nexus 7

My Nexus freezing also after installing ?Torrent Beta and downloading a PDF file, but I can't Unlock Bootloader

 

[2defmouze]

Re: [GUIDE] Factory Image Restore for your Nexus 7

My Nexus freezing also after installing ?Torrent Beta and downloading a PDF file, but I can't Unlock Bootloader

As I noted earlier, your case unfortunately seems much more like a hardware failure, not to do with the system itself. Since it is locked and you cannot get it to boot or perform a factory reset, I would just try to exchange it for a new device, as the hackery we can fix with a factory image restore just doesn't seem to apply to your issue.