Quoted from SunKing:

Is anyone here running the Pascal board in their Haunted house? If so, I'm curious if your 'trap door' stays open during gameplay. It's strange - the trap door closes after a game is over (and when no game is being played) so I know the mechanicals work. However, as soon as you start a game, the trap door opens and remains open for the duration of the game.
Does anyone have any thoughts/suggestions?

Quoted from radial_head:

GTB-MA309 at http://www.pbresource.com/boards.html
In the process of testing that coil with the proper voltage, my hand slipped and a probe connected two points that shouldn't have connected. Quick firing of some coils and then the game stopped in its tracks. When I start the machine, the shoot again lights are lit, the right kicker kicks, 5 seconds of silence, then I get all displays pointing 0 and two kicks from the upper graveyard kicker every 30 seconds or so. Any tips on where to start poking around?
I've been watching Clay's TOP videos to try to better understand these games but some of this stuff just goes right over my head I'm afraid when it comes to chip logic and logic probes and reading chip schems.

Quoted from radial_head:

Looping back around to this. I still have yet to get the original MPU board of my Haunted House working. I checked and socketed and changed in new 7400 chips in Z13 and Z14 and got nothing. Just out of curiosity I put the MPU into my black hole and strangely enough it did the same thing. Turned the game on and it instantly kicks a ball out and lights the shoot again lamp. No 5 second waiting period. Curious if that should point me somewhere to a shorted chip or diode or something in the reset section of the board. I'm going to start digging around when I get home tonight and do some schematic looking to try and figure this out, but if you're reading this and have any pointers from memory, let me know!

Quoted from jhummel:

Hi All,
I've been looking for this game for a little while and have a chance to go look at one from a private seller. I've heard stories about this being a maintenance beast, and this will be my first pin. While I have no problems doing some regular maintenance, I also don't want to bring something home that will be more of a time-suck than it has to be. I was wondering if I could get any pointers on certain things to look for when I'm examining/playing the machine that might give me an idea about what I'm in for. Thanks in advance, hoping to join the club soon.