I also have a X51V that is stuck at the blue Dell Logo screen.

Ive done the SD card flash of A06 that I downloaded from the dell website.This process goes through to the hard reset page. When I press the Power/Reset combo the Axim starts its reboot but then again freezes at the blue Dell logo screen.
I've also ran the diagnostics which completes. But, the results are as follows:
CPU - Pass
SDRAM - Pass
RTC - Pass
FLASH
LCD - Pass
BUTTON - Pass
AUDIO - Pass
LED - Pass
RECORD - Pass
TOUCH - Pass
Notice no "Pass" after Flash! Is this the problem? Is there a fix? Anyone else have or get around this problem?
I've left the thing sitting for a whole day to see if it would go ahead and boot at some point with no success.