I have replaced 3 out of 4 boards with Alltek boards but they won't respond to my questions. Here are my voltage readings.
MPU
TP1 .122VDC looking for 5
TP2 44.5VDC looking for 43
TP3 Ground
TP4 .124VDC looking for 5
TP5 Fluxuating looking for VMA?
TP6 Zero Crossing ?

Solenoid Driver Board
TP1 243.9VDC looking for 240
TP2 187.3VDC looking for 180
TP3 -.38VDC looking for 3.3
TP4 15.4VDC looking for 12
TP5 No test point
TP6 .173VDC looking for 5
TP7 44.4VDC looking for 43

Power Supply
TP1 6.03VDC looking for 5.4
TP2 240.5VDC looking for 230
TP3 15.45VDC looking for 11.9
TP4 6.88VAC looking for 7.3
TP5 44.4VDC looking for 43

Any idea of where to start would be appreciated or if someone in the Cincinnati, Ohio area that could help/fix would be appreciated. I attached a picture of the backboard with the overvoltage light on the MPU board lit.

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I pulled the 4 connectors off of the Lamp Driver Board and that didn't make any difference. I don't have the old board to compare the dip switch position that I set up when I installed the new board but I remember double checking these several times. How do I make sure it is on free play? Thanks

I switched the 1st game selector switch up, it was down. There are no flashes on the MPU, just the red overvoltage light on steady.

006 (resized).JPG

Yes I repinned them

.1VDC at the connector.

I unplugged the connectors on the driver board, MPU, and the lamp driver and the 5V light is now on the solenoid driver board.

I don't have a schematic (wish I did). But I did one pin at a time. Sounds like I need to check each pin connection. Thanks

Thanks for the schematic. I'll verify the connectors.

I spoke with Dave from Alltek today and he found that I had installed the MPU board incorrectly grounding it out. Thanks for everyones input!