The power troubles for the Harlem Globetrotter on Tour pinball machine appear to be solved!
After connecting the boards up, the test point on the board was showing low voltage. I was looking at having to pull components of the circuit board to try and solve the issue but after reading about Nic's "swab-polish-swab" technique where he wipes with alcohol, then polishes with a dremel and wire brush and then a final alcohol wipe - I decided to try it on the connectors.
It solved the problem! Although they looked perfectly ok to me and I had seated and unseated the connectors many times, this time it seems to have fixed it and I was getting the correct voltage.
I plugged all the boards in, including my new MPU board and turned it on with great anticipation.
The lights came on, but the MPU board would not go through its self-test successfully. I could hear a coil pop and then it looks like it froze.
My guess is that I have a bad coil and its causing the new power board to pop its internal breaker.
Tme to start testing coils!
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