I finally have my Seawitch working now!!!!!
MPU was crashing upon boot up. Disconnected sound board and that stopped the crashing.
Ultimately swapped to an Altek MPU but pretty sure the issue was 2 shorted pop bumper coils. Someone had a 5 amp fuse in place of the 1 amp fuse for the playfield which did not help the matter. Clipped the 2 coil wires for now and changed to a 1 amp playfield fuse.
Could not start a game and do any testing till I found a wire slightly off one of the coin door switches. Soldered that and was able to start a game.
One GI wire was off on the back right of the payfield as it was catching the slide rail. Soldered that back on and moved the wires out of the way of the rail and GI is back in action.
Cleaned ball drain switch so it actually registered and then played a game!!
Tried plugging in sound board cables to the Altek MPU and sound is working with no crashes!!!!
Lastly there were no controlled inserts. Test point 1 on the power supply getting no voltage. Swapped BR1 (bridge) and still no change. Turns out the fuse clip was dirty. Took a dremel to the fuse clips and BOOM we have controlled lamps!
Been a fun project. Next up is cabinet paint, playfield and plastics, drop targets and flipper rebuilds! Then siegecraft adapters and LED's!!!!!