once when we (friends + me) experimented with jornada 720 disassembling (fun to watch it ), and we tried a rom in a non working jornada, then it still didnt work, then we put the rom back to the working one, and it would not boot any further than that initial screen. the cause of problem / solution: we did not remove the backup battery when exchanging rom chips, so a rom reseat alogn with a hard reset helped.
of course this is not the same story, but..
Well, you've given me something to think about. It happened the first time I tried a soft reset after installing the ROM. I only reset because I had followed the seller's instructions and backed-up before swapping ROM's, then restored from the back-up.
Well, of course that didn't work, since the back-up registry didn't match the new ROM. I just went ahead with a hard reset and accepted the necessity of reinstalling everything one piece at a time to get back to my original configuration.
I never thought of the possibility of a mechanical problem with the ROM install.
Since I have just had to do a hard reset, I might as well give reseating the ROM a try.
As far as the back-up battery goes, that's a disassemble job on the MP, I think. Do you really think that is necessary?
to watch it 
), and we tried a rom in a non working jornada, then it still didnt work, then we put the rom back to the working one, and it would not boot any further than that initial screen. the cause of problem / solution: we did not remove the backup battery when exchanging rom chips, so a rom reseat alogn with a hard reset helped. 
That seems to have done the trick! 
