[Nexus 7 Q&A, Help & Troubleshooting] limbonik:
Okay, so I'm having what I believe to be a strange issue and was hoping someone here might be able to help.

One day my Nexus 7 (2012/wifi/grouper) started to reboot while sitting on my desk. It then would go into a boot-loop. I turned if off for a bit and every time since it does the same thing. Loads up correctly but after any amount of time it will do the same thing.

So I tried a Factory Wipe & Erase. It went through the whole deal and I rebooted it; but the device didn't wipe or erase, everything was still on the device. >.>

So I decided to flash back to stock. (device was/is unlocked/rooted). Updated the SDK and made sure adb and fastboot both work correctly and that I had the most recent updates to anything available. USB drivers are current and working correctly. Fantastic I say to myself as I go through the fastboot process of returning to stock.

C:\android-sdk\platform-tools>fastboot devices
015d2d42201c1213 fastboot

I hit fastboot devices and it shows me my device, so I go through the normal bits. This is what I get:

C:\android-sdk\platform-tools>fastboot flash bootloader bootloader-grouper-4.23.img

sending 'bootloader' (2100 KB)...
OKAY [ 0.283s]
writing 'bootloader'...
OKAY [ 0.596s]
finished. total time: 0.879s

Awesome! It appears everything is working fine, so I figure I might as well continue.

C:\android-sdk\platform-tools>fastboot -w update image-nakasi-krt16s.zip
archive does not contain 'boot.sig'
archive does not contain 'recovery.sig'
archive does not contain 'system.sig'
--------------------------------------------
Bootloader Version...: 4.23
Baseband Version.....: N/A
Serial Number........: 015d2d42201c1213
--------------------------------------------
checking product...
OKAY [ 0.030s]
checking version-bootloader...
OKAY [ 0.019s]
sending 'boot' (4990 KB)...
OKAY [ 0.652s]
writing 'boot'...
OKAY [ 0.177s]
sending 'recovery' (5530 KB)...
OKAY [ 0.722s]
writing 'recovery'...
OKAY [ 0.184s]
erasing 'system'...
OKAY [ 0.021s]
sending 'system' (611886 KB)...
OKAY [ 78.120s]
writing 'system'...
OKAY [ 27.180s]
erasing 'userdata'...
OKAY [ 0.030s]
formatting 'userdata' partition...
Creating filesystem with parameters:
Size: 14442037248
Block size: 4096
Blocks per group: 32768
Inodes per group: 8176
Inode size: 256
Journal blocks: 32768
Label:
Blocks: 3525888
Block groups: 108
Reserved block group size: 863
Created filesystem with 11/883008 inodes and 96825/3525888 blocks
sending 'userdata' (137526 KB)...
writing 'userdata'...
OKAY [ 25.415s]
erasing 'cache'...
OKAY [ 0.012s]
formatting 'cache' partition...
Creating filesystem with parameters:
Size: 464519168
Block size: 4096
Blocks per group: 32768
Inodes per group: 7088
Inode size: 256
Journal blocks: 1772
Label:
Blocks: 113408
Block groups: 4
Reserved block group size: 31
Created filesystem with 11/28352 inodes and 3654/113408 blocks
sending 'cache' (9052 KB)...
writing 'cache'...
OKAY [ 1.655s]
rebooting...

finished. total time: 134.326s

Alright, we're booting back into the device and it appears to have gone fine! But then I notice I'm still seeing the Jellybean "X" boot screen and think to myself well, that's kind of strange...The Nexus 7 loads up and...nothing changed. The device still has everything on it that it had previously, nothing has been changed or deleted.

I've tried deleting (user data such as music or videos) using Windows Explorer. I've tried File Manager and ES File Explorer via the tablet. But every, single time I turn the device back on...everything is still there!

So I guess what I'm trying to figure out is...am I high? Did I die in my sleep and I'm just not aware of it yet? Has my Nexus 7 been cast for a sequel of Groundhog's Day?

What am I missing here? I've done this time and time again but I don't think I've ever seen something like on any of my previous devices (or with this N7 in question as well...)

Hopefully I'm missing something very minor here and someone will make me feel stupid for it. I don't mind feeling stupid if it means I learn something new! (Any and all help would be greatly appreciated.)