I picked up a non working Konami Top Gunner PCB in a really stinky converted Zaxxon cabinet. Still trying to decide what to do with the cab, so in the meantime I figured I'd troubleshoot the nonworking PCB. The board shows no signs of life when powered up in a known working cab, and the monitor just shows white w/horizontal lines. The only history I have of the board is "it used to work, then I put the cab in my garage for 2 years and now it doesn't work anymore".
I cleaned the board, reseated and cleaned all the socketed chips and cleaned the edge connector. I put the PCB into my Astro City cab and got 5.15v, -5.15v and 11.96 when testing at the edge connector. Visual inspection shows no missing parts, no bulging or obviously broken caps, and no obvious cold/cracked solder joints.
Not sure where to go from here. Any ideas?
I cleaned the board, reseated and cleaned all the socketed chips and cleaned the edge connector. I put the PCB into my Astro City cab and got 5.15v, -5.15v and 11.96 when testing at the edge connector. Visual inspection shows no missing parts, no bulging or obviously broken caps, and no obvious cold/cracked solder joints.
Not sure where to go from here. Any ideas?

