oh, sorry, didnt read the first message completely. still, its worth checking the area once more, to be sure. (if it ever had batt leakage).
i think you would need two terminators if it has external scsi. check that too, or put some drive on scsi. without proper term, it probably wont boot.
have you checked all video outputs?
what about LEDs on power up, does it pass the initial test?