[geekmaster]

Originally Posted by mikoff

Thank you.
Did you mean this video?
http://www.youtube.com/watch?v=7OCpJbkGb7M
It`s for kindle 3, not for dx.

DX should work the same way as K3, but you need a DX firmware image instead of K3. The different serial connector location and pinout is shown in Dev corner / master index / DX index.

Before the "simple debricking" method was developed for K4 and K5, the serial port was the ONLY way to debrick or flash kindle firmware backups (even for the K4 and K5).