I'm a new member to Pinside and I'm hoping someone has some advice. I acquired a Bally Power Play machine a few years ago and have been enjoying it ever since. I recently decided that it needed some tune-up work as a lot of bulbs were out and some plastic had faded.
Bought a kit from MarcoSpecialties and proceeded to replace all of the rubber and plastic parts as well as the lights. Most of the bulbs were burned out but I had several light 'sections' that still were not working. There was also no measured voltage across the terminals.
Couldn't find any line breaks so I decided to replace the lamp board. This went well but only a couple of the bad lights came on with the new board.
I left the unit in lamp-test mode and examined the circuits a little closer. Moved one cable and one of the circuts energized. I will rework that solder.
The main problem came when searching another circuit. While searching, and the unti still in lamp-test mode, I heard a unfamiliar hum and quickly unplugged the unit. When I plugged it back in, I could no longer get the unit in lamp-test mode, and some of the always on lights that were working before are not working now.
I replaced the new lamp driver board with the old one and no change.
Not sure what I could have done. I can't get the unit in lamp-test mode. The other test modes do work, but the score displays in their test mode are displaying invalid digits. The game does go into play mode ok, and manually hitting various items, it does score ok, but I still have light issues. I have alos checked all of the fuses.
My next idea was to replace the MPU board, but I thought I would see if there is something else I should be looking at.
Pleasant Plains, IL
