Hello and welcome! I recently picked up a Laser Cue machine based on one picture and the description "Lights work and flippers work. Ball won't eject, unable to play" so pretty much going in blind. I should mention, this is my first pinball machine that wasn't purchased from a dealer and I couldn't have been more excited to finally work on a machine myself!
I got the machine to my house and immediately plugged it in and tried running a game.... Whomp, whomp, whomp. The game goes into the dreaded 'audit mode'. I open the the box and behold(!) a leaky battery with corrosion going down the driver board. I was able to start a game by cycling through the diagnostics. My displays are 100% working and I am getting sound as well, but I have never played the game so I'm not sure if the sound is right.
So when I start the game, as mentioned in the brief description I received, the ball does not shoot out of the outhole! Not only that, but the pop bumpers, drop targets, and slingshot are all dead with no action what-so-ever. I believe the bell is also dead but I'm not 100% sure. However, all the flippers DO work.
Start of repairs:
I replaced the battery pack with NVRAM, replaced the capacitors on the power supply, and replaced all the fuses.
I turn on the machine and it now start in attract mode and I also notice general improvement to the lights on the play field. (Win!) When I go to start the first game, one pop bumper went off and then I get a fuse blown. One drop target reset as well during this. Outhole, pop bumpers, drop targets, and slingshot are all still dead. This is where I am currently and could use some help diagnosing what the issue is!