So this is my project r&b I have been messing with https://pinside.com/pinball/forum/topic/data-east-rb-cpu-parts-list
So I have all the battery damaged cleaned up and fixed. Replaced a lot of the tip122's for the coils. At first it was working well and then Radom coils would lock on. So figured the tip122's I had were junk. So re-replaced them and now I am having other coils lock on that haven't locked on before. Both of them are 50v coils. The play field vuk and the lion feature in the back box. The transistors on CPU and ppb board check out good still. Could it be further upstream? I'd love to get this working before a Christmas party that is happening next week.

I can pull the transistors but no logic probe. Will report back in a few

Well, found 3 pre drivers blown and 2 drivers. So put it back in same coil locks and this time blew the 50v fuse on the ppb board. Don't get what could be causing them to blow

The messed up part is that the ppb is good. The tip122's are what keep blowing on the cpu

So I unplugged the lion coil and thought I'd try it again after replacing the f5 fuse. So turned it on and fuse instantly fried. Never seen a fuse glow that bright before. So any ideas though?

the lion mod takes it down from the 50v. I think I may need to do some checking on the power supply. I am thinking maybe something is shorted and is not regulating the voltage properly.