I just realized that one of my LCD displays has a built-in USB hub that I have never used before.
When a kindle is plugged into a USB port on the LCD display, and the display USB is plugged into a host PC, I set fastboot mode from windows with MfgTool. I have a serial terminal open while monitoring serial output from the kindle.
As soon as I disconnect the host PC from the LCD USB hub, the serial display immediately shows that fastboot dropped out and the kindle is sitting at a u-boot bist> prompt, just like when no USB hub is used.
Oh well... it was worth trying, but another dead end...
EDIT: For now, the only way to use MfgTool and fastboot is to run either linux or windows in a Virtual Machine (emulator), or to get fastboot working in cygwin on windows.
*** Has anybody gotten the cygwin version of yifanlu's kindle fastboot tool working correctly?
Last edited by geekmaster; 03-08-2012 at 12:45 AM.