Thanks for the advise. The fuses are making good contact. The outputs are correct on the output connector of the PSU.
I think I'll need to check the voltages at other places around the machine but do not know where the test points are. Apart from the main reel board where 5v is marked.
Do you know if any lamps are directly connected to power and not controlled by the MPU4 processor board? Coin slot maybe?
Thanks for the reply, I have since now fixed the issue.
My track repair work was fine but putting the MPU4 back in the cabinet the refill key switch cabling had become shorted on the metal cabinet internals.
This had burnt up 47ohm R85 & 4.7v zener diode ZD24 in the MPU4.
With these gone it knocked out all the door switches, coin detect, and some of the game buttons....
Replaced these two components and tested okay - she lives again.
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