In article <49jb0n$d8g@gap.cco.caltech.edu>, nathan@cco.caltech.edu
(Nathan Mates) writes:
>
> Next time this happens, I'm gonna take a close look at the power
>connector and the pins on the motherboard, and scrape off anything
>that looks problematic.
>
>
You might also try popping the motherboard and resoldering the power
socket pins.