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I am repairing a Gain Ground cabinet and am having trouble getting the floppy to work. The game will boot and sit on the loading screen; but the mainboard works and passes all self-tests. I have several floppy drives and some of them will cause a drive not ready error and the others will sit...

So I built a jamma to system x converter to test some afterburner boards on my rig and they work ok but I can't use test mode or get any input for that matter. The test button works in the cab. Probing the filter board directly seems to do nothing.

I have a Magic Sword PCB that runs fine but has distorted graphics. Issue is isolated to B or C board and not A board custom. I reflowed the C board, and no change. Isn't CPS1 palette ram located on the A board? Any ideas on what to check?

I am fixing a Moonwalker pcb and the FD1094 is very dead. The game turns on to a black screen with no sound or video. I burned replacement roms for 13232 and 13233 and have a 68k; and still no signs of life. I can see activity on the cpu and work ram with a scope. For some reason I also have a...

I have a Terminator 2 board that boots but shows a U99 error. The U99 was pulled out and put into a Mortal Kombat; where it ran ok. The game will try to boot after self-test into a black screen with no sound but after 40ish seconds arnold schwarzenegger's face pops up (the hi-score screen). I...

I got a golden axe board running but it is silent and pink. Game works otherwise and passes all self tests. Swapping the Z80 gave no results. Any advice on what to check?