Museum of the Game® & International Arcade Museum® Forums

I am trying to help a friend of mine with this. I went over there today and wanted to do a self test first (specifically the 3rd one that tests all the solenoids.) but the test button does nothing. On machine boot, the green LED only blinks 6 out of 7 times on the MPU board.

I gather a common problem when this happens is that r113 has failed. When I checked it with the multi-meter ohm setting that resister didn't give the same reading as the ones near it, so I supposed replacing it is the next step. That whole area of the board looks rather nasty from old battery most likely. I was hoping to get the MPU board going again and then troubleshoot. The owner told me when it originally broke down that he was playing the game and sunk a ball into a hole and the game froze. He removed the ball and tried again. Then it would boot, but then would not be able to start a game. He was able to run the self test up to about months ago.

Open to any ideas and opinions on this as it my first attempt to try to work on a pinball machine.
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