Finally got my Haunted House put back together. epeabs was kind enough to help me with some cleaning and polishing and refinishing of some topside metal parts. When everything came back together, a few things happened.
1.) the displays are all wonky. Player 2 is consistently on, all segments, all the time. Players 3, 4, and the bonus display strobe gently with care and artistry
2.) The lower pop bumper works (was dead before) but now the lower main PF pop and the upper PF pop rapidfires when held down. Obviously this doesn’t affect gameplay as a ball doesn’t hold the pop down, but it shouldn’t be that way.
3.) The lightning effect does nothing.
My hyposthesis. Help me out and let me know if my thinking is correct.
1a.) Two suspects. A1J6 has been replaced and whoever did it did a shitty job. I’ve been waiting to find a NOS edge connector to replace it, but to no avail. When I would disconnect and reconnect that cable, it would make a difference (working to not working) but now it does nothing. From my understanding, that was just the switch matrix send/return, but maybe it has a larger effect?
Should I be replacing the 7448 chips on the upper right or should I be looking at the driver board? I am lucky enough to have a Swemmer MPU so switching the chips would be easy. When I got the game the driver board was acting up. I replaced it with one I “thought” was working. Possibly not though.
2.) No clue on this. Switching pop bumper boards does nothing. Not really sure on this one.
3.) I’m wondering if, since the lightning board is giving me issues and the displays are wonky, it has to do with the quad of 7448 chips on the upper right corner since theyre all on the same wire stack running from the CPU to the Displays and the Lightning Board, but I’m a lost on where to start.
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