Apologies for noob questions in advance. Hoping someone can point me in the right direction. Picked up a beat-up non-working cocktail table version of Midway Double Play that I am hoping to bring back to life.
When I got it home and replaced the stripped out power cord, it actually powered up, the monitor showed the little dudes running into the field, and for a full two seconds I thought I got a great deal and got lucky. Then the screen started flashing and went blank. Definitely looking like a pcb issue rather than monitor, since I can get graphics out of the monitor (see below).
Actions taken:
Cleaned edge connectors
Reseated socketed PROMs on the main board
Verified voltage on the power board
Pulled the PROMs and got the two sets of clean vertical lines (per the Midway Processor Board Test Manual)
At this point, with the PROMs in place, when I turn it on the game flashes 8 screens of moving bars and then either goes blank or shows some random graphics.
I read somewhere regarding another Midway 8080 game that it could be something to do with the reset signal and that grounding that might get around it temporarily, but I could not follow how to do that.
So, I guess two questions:
Any ideas on what to try next (noob to intermediate level)?
Anyone know someone who does repairs in the Columbus OH area who I could contact?
Thanks in advance for any assistance provided. It is a really cool table and I am looking forward to getting it sorted out (somehow).
When I got it home and replaced the stripped out power cord, it actually powered up, the monitor showed the little dudes running into the field, and for a full two seconds I thought I got a great deal and got lucky. Then the screen started flashing and went blank. Definitely looking like a pcb issue rather than monitor, since I can get graphics out of the monitor (see below).
Actions taken:
Cleaned edge connectors
Reseated socketed PROMs on the main board
Verified voltage on the power board
Pulled the PROMs and got the two sets of clean vertical lines (per the Midway Processor Board Test Manual)
At this point, with the PROMs in place, when I turn it on the game flashes 8 screens of moving bars and then either goes blank or shows some random graphics.
I read somewhere regarding another Midway 8080 game that it could be something to do with the reset signal and that grounding that might get around it temporarily, but I could not follow how to do that.
So, I guess two questions:
Any ideas on what to try next (noob to intermediate level)?
Anyone know someone who does repairs in the Columbus OH area who I could contact?
Thanks in advance for any assistance provided. It is a really cool table and I am looking forward to getting it sorted out (somehow).
