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Museum of the Game® & International Arcade Museum® Forums
I've pulled every ram chip and tested them on a tester. The game originally came up with a 1-3-8 which was actually bad and after I replaced it then got the 1-3-1.
I tested all of the following
74153's
7474's and the logic chips 7486,7408,7410,7404
I didn't test the shift registers yet.
I tried verifying the decoder chips and then dug into the mess around those. I may buy a set of replacements.
When the game comes on the rug pattern is messed up and garbage stays on the screen. At times I do get some text or color rotating on the title screen while still garbage. I can also press player 1 start and hear the starting sound but thats it.