[geekmaster]

You cannot trust the green LED.

If you can get data.tar.gz on it, perhaps that will run the runme.sh before it powers down, so you can fix it that way.

I fixed my kindle one time when the USB drive only appeared for about 10 seconds before the kindle powered down. I installed a repair script using an ubuntu linux host PC, like this (from memory, so could be incomplete):

while true; ls /media/Kindle 2>/dev/null && cp data.tar.gz /media/Kindle && break; sleep 1; done

If you get the file on it, try rebooting to see if it installs. Of course, it needs a custom runme.sh script that will repair your problem.