Question, is it the power supply wired incorrectly or backplane board. Im working on a bally 5000 Plus reel that's been sitting for years going to send boards off to get checked and repaired , but trying to fix power problem 1st . Original power supply was DOA, so bought a aftermarket supply. meanwell RQ85D. I believe every thing is hooked up correctly but when I plug it in and flip the on switch nothing happens, no lights on power supply no power even to on switch, fuses are good but no power passing through fuse either. thought maybe p/supply could be bad so I hooked power directly to the supply and everything light up p/supply on, all of the lights and display still issue with boards but that's another problem. but with it hooked directly to supply, power continue through switch whether on or off .I know I cant leave it hooked like this .tried to trace . I do have power leaving transformer that's on the power supply deck,but not coming back to power supply. I hope Im making sense.. Any ideas