Trying to get a project game running. Got the MPU200 to boot by replacing the 5101 with NVRAM. Doesn't look like any acid damage but this NVRAM fixed the stall at two flashes. This MPU runs in my other working F2K. Except for some reason the lockout coil didn't work (but did with the original MPU).
I am dismantling the project game playfield to do a swap and placed a fully working playfield in the project cabinet. When I tried to get this MPU working initially it was with the partial playfield so thought the working playfield would solve this but it hasn't.
Sometimes i can start a game but seems like activation of upper left sling makes the MPU go into a reboot cycle. Sometimes it just reboots on it's own. It counts up to 18 and runs through all the solenoid tests and reboots, again, enters solenoid test, etc.
I have no speech but do have sounds.
I checked the test button and memory clear button and they have continuity to their board connectors and the switches work when tested with my meter.
Don't know if its a separate problem but player 3 display flickers and when I move the display the flicker stays with the player 3 location and doesn't move with the display.
Also can't add games by using the coin trip wire. Is that a symptom of some cabinet wiring issue?
Since the playfield worked and the MPU worked in a different cabinet what else should be checked? I went through the solenoid driver board but I can swap that if it could be the issue. Should I unplug the sound board or lamp board? Leave off an MPU plug??