Quoted from Quench:1) Remove the ball from the outhole and play a ball. Rack up a bunch of bonus. Then drop the ball in the outhole. The game will tilt *BUT* does the game silently countdown the bonus - i.e has it recognised that the outhole switch has closed?
Okay so I booted up the game did your test and the game worked normal, all switches operating normal, the right pop bumper working normal, flipper lanes scored appropriately (not adding the additional 1000 points). Test it for a couple games. Then decided to try and actually play, when I lost the ball in play it tilted and from there on out all problems back. So starting a game with the ball out of outhole, I manually racked up a bunch of points on the bonus, the ball immediately tilts entering out hole. The game silently processed the bonus's but did not add the score to the display, just did the cycle of lights around the bonus, proceeded to reset the drop targets then stop there. again if i manually separate the out hole switch the ball gets kicked out.
Quoted from Quench:1)2) In switch test mode, do the switches on row return line 6 report correctly? i.e. tilt switch = 07, left outlane = 23, 5000 arrow lane = 31?
The tilt pendulum, ball tilt, and playfield tilt all register 7
Left Out lane registers 23 (so do the flipper return lanes)
5000 arrow registers 31 (so does grotto switch)
Quoted from Quench:1)3) Disconnect the J2 connector from the MPU board (so the playfield switches are all disconnected). Power up the game and go to the switch test. If you activate the slam tilt switch on the front door, does it report as 16 or 15? This will hint at whether the problem is on the playfield or the MPU board.
With the connector removed the door slam and the slam next to the pendulum both register 15.
Below is the post I started when I acquired the game, you can see what the board looked like when I got it. My first board repair/revival, but looking like it still has issues. The discolored solder on the components yet was caused from the toilet bowl acid I used to get the corrosion off. I'll post a couple more pics of the board all done with the components replaced.
https://pinside.com/pinball/forum/topic/bally-playboy-mpu-repairable#post-3539539
U10/11 were resocketed and chips are original ( I have replacements on hand)
U8 resocketed and chip replaced
U14 replaced
U9 Original socket and chip (I have the items on hand resocket it and I have replacement chips for U9)
Did the battery acid damage kit from great plains, and did several other components beyond that kit that were not included.
I did not replace the dip switches but have them on hand if deemed needed to replace
When I finished the chips that I did resocket or replace I did check for continuity to the next component from each leg. All new header pins and all wires have new crimp terminals.