My Bally Xenon didn't have a cover over the power supply board. I assumed this was just to stop you accidentally electrocuting yourself with the high voltage section and it didn't trouble me much. I was playing Xenon the other night when all the displays went out. Didn't take long to discover why, the bottom of a pop-bumper bracket had broken off and dropped onto the power supply fuses causing a short. The F2 three-quarter amp fuse had blown, now when I replace, it there's a loud buzz and it blows again. I suppose there's a lot of metal components, nuts, screws etc which could come loose and drop onto that board, so i've now made a cover.

Any suggestions as to what may have fused and is now blowing that fuse.

P1000112_(resized).JPG

Thanks guys, I will check when I can but my meter has died and I've just ordered a new one of those. Have you noticed how everything seems to go wrong at once. Both my Xenon and Centaur had run happily for months, but I've had both out of action the last few weeks with various faults and then a piece of metal drops onto the power supply!

Once I was able to test I found both bridge rectifiers and 1 diode tested bad. Replaced the bridge rectifiers and all diodes as I was there and all is now working. My new cover is sitting over the power board to catch anything metal that happens to drop from above!

Thanks for the advice as usual.