After the KitKat OTA it developed a problem where the tablet was on but the touchscreen was unresponsive. The only way to fix it was to shut it down by holding the power button. Eventually it started being stubborn and I'd have to power cycle it several times before it would clear the Google screen. That gradually progressed to having to do a system reset before it would come back to life.
On December 15th it finally refused to go past the Google splash. Attempting to boot into recovery also left you stuck at the Google logo. At the time I tried the WUGFresh tools to do a stock recovery and while I was successful in unlocking no amount of flashing / formatting / erasing would give you a normal boot or a recovery screen.
I sent it off to ASUS on 12/17 and got it back this past Monday (1/13). It worked fine until Tuesday night when once again the screen was unresponsive and I had to shut it down by holding the power button. It's now stuck at the Google screen and no amount of flashing / formatting / erasing using FreshWug or fastboot directly via command line has brought it back.
Here's what I've done so far:
- Spammed flash-all at least 6 times
- fastboot format of /boot /system /userdata /cache multiple times
- Multiple runs of WUGFresh
- Flashed 4.4.2 and 4.3 images
What else is there I can do aside from sending it back to ASUS?