I have a few repair tips for this game. I will do my best to write them up now and add pictures in a bit.
Ramp - Protect the ramp with metal protectors. I had to make mine out of some spring steel
Power Supply - Biggest thing that fails is PP10 connector burns up. The traces on the board are to small and heat with the amount of current. Jumper or build up solder on the middle pin (5) to the lower left pin (7). These are on the same trace from the factory but the trace burns up so a jumper helps with this.