[knc1]

Originally Posted by PiTRiS

Was doing some research and went to this artile - http://www.amazon.com/gp/help/customer/forums/kindleqna?ie=UTF8&cdForum=Fx1GLDPZMNR1X53&cdThread =TxX5K9UAOD8CSZ

Isn't it possible to use kubrick (or other tool) to get to the file system via diagnostics?

Check the date on that article - it is about a K5.
Or, read the title of Kubrick, you claimed to have a PW-2 and PW-3.

Translation:
The only known way to get any of the touch screen devices newer than a K5 into downloader mode (or fastboot) is to use the installed u-boot.
Which in turn means having access to the serial port.

But if you have access to the serial port, you can fix it without the help of anything other than the available command line.