Pac Man "garbage screen" when powered up?

[BR549 Auto Sales]

Seem as if I saw a repair technique for this common problem on pac man/ms. pac man machines about changing out a bad chip on the board? If someone know if this is true, please let me know and which chip.

Thanks,

Daivd

[channelmaniac]

Could be a LOT of things.

Common failures on Pac/Ms/Plus machines:

Corroded fuse holders in the bottom of the cabinet
Heat damaged edge connector - both harness and board
Tarnished/corroded/broken pins on the mask ROMs
Bad ROM socket
Bad CPU socket
Bad ribbon cable (Ms Pac)
Bent pins or broken pins on the Z80 Sync Buss Card
Bent pins or broken pins on the VRAM Addresser Card
Bad 2114 RAM

RJ

[BR549 Auto Sales]

I doubt that anything may be bent, this just happened @ 2 months ago, up until then it was working fine. Edge connector may be a problem but the harness is fine, fuse holders are fine. I will add a picture of both sides of the edge connector later. I can check for corroded pins on the mask roms (where are they located?) can also be the 2114 ram, which I have no way to test. Thanks for the info, gives me a starting point.

[channelmaniac]

Start with the fuse holders, the mask ROM pins, and the edge connector on the board/harness.

The factory fuse holders are brass and not only corrode/tarnish but they also spread open and don't connect to the fuse as tight as they should. You can pick up replacment fuse holders at Radio Shack.

I repair Pac boards. Most repairs on those run around $45 to $50 plus shipping.