I have a MK1 bootleg board (not Yawdim). Its JAMMA connector isn't keyed, it's 2 pcbs connected by 2 gray hard connectors. Anyway, randomly it would seem there are graphics problems. Forinstance, sometimes single pixels in the energy bars are missing. Sometimes pixels in the player sprites are missing. But they do not appear to be constant. Like sometimes a player is drawn just fine, othertimes parts are missing. Also sometimes the startup or high score board text is the wrong color, ussually yellow looking. Sometimes it flickers. Any idea how to fix this? Would this be like a bad RAM chip or something? I guess it's not a huge loss if I can't fix it since I was planning on buying the original midway board set later on. Update: I tried the diagonostic test for the cpu, it says custom chip ## is bad. I think it said U99. But I don't know if that's reliable the test.
I believe that one of the pirate boards had a number of graphical issues and can't be fixed, best just to buy a decent original board as they aren't that expensive.
Ah well then I guess I just got lucky and got the one shitty bootleg version. It's a shame too, I liked how it wasn't 2 seperate boards.
Well it can't be fixed for one, and if it could be fixed easily it would be worth it. All that's on the board is a ton of RAM chips and only a couple EPROMs that I could see.
