I'm officially stumped on this. I've worked on a number of 80b games before & they can be a bitch but I'm at a loss here. I've spent weeks on this before & now have to swallow my pride & ask for help.
Have a gottlieb genesis I'm restoring from the dead. I'm treating it right. New power supply, new driver board, new swemmer mpu, new roms, new crimp connectors (& yes of course the infamous harness, all new).
Switches aren't doing anything, I can't start a game, register a credit or even get into test mode. Game boots fine & sits there in attract mode. & I believe I've ruled out every possibility. It might only be the coin door area switches at J5 on the MPU, I don't know if it is the rest of the switch matrix because I can't start a game or go into test mode. Game still boots fine & sits there in attract mode.
I've cut an end & tested every single diode on the 1A7J1 diode strip board that is tied to these switches & confirmed that every connection is being made back to the boards. I even burned & installed new roms just because I was out of other ideas. & I have 2 different power supplies here that are both confirmed good. Board is definitely getting a solid uninterrupted 5v.
& I again confirmed that every dip switch matched the original game settings.
Lastly every ground modification is done & was just double checked. All but the MPU has the ground mod which I was told wasn't required on the new mpu & I am using the newly wired harness with all new connectors & extra the extra ground wires added.
I had already sent the board back to the k's arcade & he confirmed all switches working on his raven & that the mpu is good. I'm just at a loss at this point.