When you say you bridged 5v and 100v on the "main" board - are you referring to the master display board or the CPU board?
Was the game fully working before this event?
No telling what blew if 100V made it to the 5V supply. I would suspect all the logic chips on the master display board. However, that shouldn't cause solenoids to lock on so I agree with you in that you have problems elsewhere.
You say some lights lock on, do the rest cycle normally in attract?