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Williams, 1986You're currently viewing posts by Pinsider GRUMPY.
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Your power supply is all original and should be rebuilt, you also need to add fuses to the bridge rectifiers to prevent a fire. Someone has removed the battery holder from the CPU board, if there was corrosion damage in the past it can be affecting the display blanking signal trace which will shut off the displays.
Quoted from cngizbleevng:I don't see any corrosion on the board where the batteries were removed.
Then you should remove the power supply and look for a cracked solder joint on the back side of 3J5 connector.
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Pulaski, PA