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  1. Defender Switcher/Switching PS and wiring harness

    Hey everybody, I have a mess on my hands. I picked up a Defender game that I didn’t want to go to the junkyard. It’s a mess inside (I can supply pics if needed). They removed the linear PS and installed an Arcade Shop conversion board to the switching PS. The wiring from the CP and cook door are...
  2. Missile Command 810K Bug and 255 Screen "chip fix"

    A friend has a Missile Command that has a modified boardset. There is/was a bug that would give you like 150 bases, if you hit 810,000 points. The arcade owners seemed to take offense to the chip and a replacement was made to remove the bug. It also fixed the 255 screen bug. Does anyone know...
  3. Ms Pac Man dead. Vram Addresser?

    I went to fire up my Ms Pac Man last night and it wouldn't do a thing. I looked in on the PCB and gave it a nice once-over to check for bad/blown components. I noted 2 things. 1. When I tapped the ribbon cable going to the secondary board, a couple of times the game "beeped". 2. The Yellow...
  4. Need someone to peek in their Centipede

    This is a cakewalk (I hope) for someone with a Centipede game. I picked one up the other night, and I see the scan lines zipping up and going left to right across the screen. The only odd thing I see so far on the game is an extra wire that's not attached... Or grounded??? On the wiring...
  5. Midway Power Supply 90412

    I have a TRON game with a 90412 power supply. It's board number is a A082-90412-D000 I've seen A000 thru D000, so I am uncertain what the differences are between them. What has happened is that the PS must have had a partial failure before I bought the game. One of the previous owners cut...
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