I have a Demolition Man that has some locked on coils. As soon as the game boots up the right Pop Bumper and the Diverter lock on. The Tip 102's measured fine but I replaced them anyways. I put the driver board into my Terminator 2 and same result so I know the problem is on the driver board. I had a light issue also so basically I replaced every one of the big caps and bridge rectifiers. I also replaced all 5 74ls374 chips. Same thing. Tested the pre driver 2n5401 and resistors and diode related to each transistor and they test ok. Any help is appreciated. Going bonkers here

Just put I. New 2n5401. Same result. Don't know what else is even in the circuit that I could check at this point.

I went back and replace U4 and U5 because I had put chips in there that I wasn't sure were new. Put I. New chips and now the pop bumper is Ok. Diverter is still locking on. I narrowed it down to transistor Q46 because the Diverter coil has a high and low. Replaced Q46 and the prescriber 2n5401. Still locking on. Double triple and quadruple checked my soldering work on the new chips and the new transistors. Resistors an diode in the circuit are good. Any chance this is a CPU issue? I didn't think there was a switch that controlled the Diverter.

I got it finally. When you look at the switch matrix in the manual, nothing says "Diverter" so I assumed it wasn't controlled by a playfield switch. Went through the playfield switches and one switch at a ramp entrance was stuck closed. Fixed the switch and the seas have parted!!!!
Big thanks to everyone for your help. Much appreciated!!
This is my favorite game and it was driving me nuts!!!!