Dear kali members,
Around 6 months ago, i hacked my new nexus 7 tablet to put nethunter on.
Now, today: he's death.

I started out with my mini laptop and nexus root toolkit.
i rooted my tablet succesfully.
After that, a few weeks later, my andriod updated itself 2 new versions.
The root program on it says i have to unroot it and re do it.
On my windows i unrooted it and it failed.
After that i messed it even further up by messing with the device manager en de usb drivers.
if i put my tablet on it showes a failed unlocked andriod boot loader.
kali linux does not recognize my tabled, nether windows.
i have now a full desktop instalation and the mini laptop its windows is gone.

so here's the big question:

how do i fix a compleet death usb connection with a failed fastboot loader that only has the option to start, poweroff, restart bootloader, recovery mode.
which in this case only the poweroff option does poweroff. even the touchscreen does not work.
i realy want my tablet back so please help me.
installing a new rom and format my device is not a problem. put the usb connection is the big problem.

here is some detail for my tablet;

nexus 7 2012 16g
1 ram
no working andriod
no working booloader
no working usb, it only recharge the battery.
it was new when i buyed it.

thanks for help.