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Root Nexus 7 fastboot not working

N

narcissisticpenguin

Newbie
Hello guys, I tried many times to use the 'fastboot oem unlock' with adb but for some reason it does not work.

The text that appears on the cmd window is as follows:

"erasing userdata...
erasing userdata done
erasing cache...
erasing cache done
unlocking...
FAILED <remote: <Unknown error code>>
finished. total time: 5.817s"

I would appreciate it very much if you guys could help.

P.S I have tried all ports on my laptop and different usb cords.
 
well the problem is that I cannot get into my tablet, it gets stuck on the google screen. I tried to unlock it so i could flash a stock image but it won't let me unlock either
 
just for giggles lets try this

Code: 
fastboot oem lock

then reboot to bootloader and then try

Code: 
fastboot oem unlock

see if that does anything.
 
so first when i do the "fastboot oem lock" i get this:
<bootloader> Bootloader is already locked
OKAY [0.031s]
finished. total time 0.031s

Reboot to bootloader then I did "fastboot oem unlock"
i get the "unlock bootloader" prompt screen highlighted "Yes" and pressed power button to select and i get the same output as my first post...it says it deleted all the userdata and cache but then this shows up:

Failed <remote: <unkown error code>>
 
do you know anything about Linux?

I suggest you try downloading a live edition (I know for a fact both Fedora and openSUSE have android-tools in the repository) and run the fastboot on a Linux machine see if its a freaky driver issue in windows.

for fedora just open a terminal window and type:
su
yum install android-tools -y

after install and still as root user type
fastboot devices <- if you get the Serial Number and fastboot then type
fastboot oem unlock

see if we still get the error if so then its something in the bootloader that may be corrupt and I'm not sure what can be done about that if that is in fact the case.
 
find it quit ironic that a name like narcissisticpenguin doesn't know anything about Linux ;)

ok try this:

Fedora(Kde)

fedora usb creator for windows

take a clean usb hook it up to your computer run the liveusb-creator program to burn the iso to the usb

have your computer boot to the usb (check bios or hit f12 for some models and f? for others hp is f9 for boot options)
once booted into the kde environment
get on the internet either wifi or cable. Once internet is working then right click the desktop choose Konsole

at the command line type:
su
then type
yum install android-tools -y

after the install has completed hook up your tablet
fastboot oem unlock
 
Alright, I am back. I have the same issue on the Fedora, I connected to internet and then opened the konsole. After that, I type in su, enter, then yum install android-tools -y. There was a wall of text and something that said install was successful, afterwards I hooked up my tablet, booted it to fastboot, and typed in fastboot oem unlock...

Similar to what happened on windows it said FAILED unknown error code
 
crap. Unfortunately it sounds like the bootloader is corrupt and without being able to unlock it there is very little that can be done. :(
 
I have heard of a tool kit that people use to unlock the bootloader I however think it probably uses fastboot to do so. Its called Nexus Root Tool Kit its the only other thing I can honestly think of that would be worth trying. If not then yes unfortunately you have a paper weight now :(
 
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