Quoted from GeekedOnPinball:
Looking at a Haunted House pin possibly. Boots and plays but no sound and the flippers in the lower playfield do not work. Cabinet seems pretty good condition, no rust. Been in the peoples home for 30 years and not maintained. I see lots of sound issues with this game in the past posts but not much about the lower playfield. What would cause lower flippers to not function? Do the sound boards usually just go bad?
If the price is good and it’s pretty solid other than those few issues, just buy it. Any sys80 that sits will have quirks to work through and need some bulletproofing.
Flippers could be a fuse or relay.
Check that boards look good, check displays work (it’s usually OK if they are a bit dim). Look for bad hacks or missing parts. Check for missing plastics and playfield wear. Factor all of this into the price you offer.
You will also typically need to do grounding mods, some power supply work, and repin connectors to make these reliable.