Hi I'm trying to help a guy diagnose a problem by text from a couple hours away. He has a Gottlieb timeline he said all the sudden the flippers stopped working and also I won't load a ball into the chute to start a game. At first I thought it was a fuse for the siloniodes but he changed that and the problem still there.
We noticed in the first pics he sent me that the display on player 1 and 3 only have 5 digits and the 2 and 4 player have 6 digits.
If that's a close up of the bottom right board, that's the driver. Probably just heatsink paste or something, not actually corrosion, unless it dripped all the way from the MPU above it (top right). Battery corrosion probably wouldn't affect the displays anyway (could be just a bad connector).
Displays are controlled via the two right side connectors on the MPU. The interconnect cable between the mpu and the driver could cause the solenoid issue, it can be quite flaky. Reseat both with game off and see if anything changes.
Flippers (and probably other solenoids, but I don't have my schematics handy) are also controlled via the game over Q relay, could be the contacts need cleaning/adjusting.
Yea that's s picture of the bottom right board. I'll get him to reseat all connectors and change all fuses.
I got him to reseat all connectors. He got his displays back working but still no flippers or ball loading into plunger lane. What to try next?
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Rochester, NY