Problem is, it does this under AC power. It's
confused. Where does the
confusion lie, do you think? If it's firmware, is there a way to flash
new firmware? Would I destory its "prototypeness" if I did that? If it's
hardware, where is the voltage sensing circuitry so I can probe to find
what it's seeing?
Might be far fetched, but if it _is_ a soft/firmware problem then you can
zap the PRAM by keeping the command/apple, alt/option, P and R keys pressed
simultaneously as the machine boots up. It'll get zapped and reboot (you'll
here the startup sound once more). Might not be it, but many times when
Macs act strangely and you just can't figure out why, that is the solution.
Nasos