@NilLuJe: Yeah it's a KV, and nope I don't see an ENABLE_DIAGS file at the root, although today when I exported the USB I'm actually seeing it as "Kindle" rather than "USB Drive" which I mentioned earlier. And yeah, I heard about the unplugging before exiting thing so I made sure to try that a few times, but it appears that it just loops back to the system diags no matter what I try.
Another thing I noticed is that the LED that indicates that the device is charging isn't lighting up (yellow or green) at all. I've tried a bunch of different microusb's and none of them get the LED to light up for more than a moment...it's strange though because I know the microusb works as I can access the filesystem with the cable.
@knc1: What thread are you speaking of? Are you talking about the "Kindle Paperwhite Downgrade" thread?
A problem though might be that I don't exactly know how to downgrade firmware or anything from the System Diags screen. I'm seeing these options on the main menu:
<DS INFO>-Device Setting
<TOUCH PLATE>- Touch Plate Test
<OTS>-Operator Test Suite
<WAN 511>-511
<PROX CALIB>-Proximity Sensor
<o>-Misc individual diagnostics
<WIFI NART>-nART factory test
<USB EXPORT>-USB Device Mode
<WAN FW UPDATE>-WAN Elmo FW Update
<o>-Reboot or Disable Diags
<POWER SUSPEND>-Lock Screen
@cinisajoy: I'll try that last probably; does it have to be 3 days without any disturbance?