Bringing a SS Cleopatra back to life. Installed a Pascal X4 board. Just one issue:

1. Everything boots up & works except for the flippers, pop bumpers, & bottom side bumpers. These are not run by the mpu.

2. Displays indicate SLAM. I jumped the slam on the X4 board; this allows everything to work, except for the coils which do not run from the mpu (flippers, pop bumpers, side bumpers).

3. The slam switches are as they are supposed to be, closed. Tilt switches are open

4. All fuses are good.

5. Q & T have been checked; rectifier has been checked.

I'm wondering if there is a ground problem to the circuit of coils run by the bottom board. Again, everything will work as normal when I jump the slam pins on the X4, but the the bottom board driven coils will not work. I think the circuit that the bottom board driven coils are on believes it is slammed for some reason (ground or something blown on bottom board).

Machine was previously not working, with dead boards. There was a dead & toasted pop-bumper coil I replaced before putting the X4 board in. I also did a re-pin of key connectors to the mpu.

Any help will be appreciated.

No.

Got it out of "Slam" (org/blk wire that goes between the two slams was not on the correct lug of the switch on the side slam) but still no power to the bottom driven coils. Checked the switch leaves on Q for continuity, they are making contact & giving a good whistle on my mm. Q pulls in like it should. Lighting not great in the garage, so am done for the evening. I'm going to take a look at the wiring on my JP (in the house) for comparison.

I really appreciate the help. I've had this machine sitting on the back burner while I got a few others up. I'm glad to finally be getting to it & am looking forward to getting rolling on it. Again, everything is functioning except for the bottom driven coils.

Got it! Wiredoug was about right, but problem wasn't Q...it was the back switch on T; it was touching really good, but no continuity until I really pressed on it. Pulled it out & gave it another adjustment & everything is good. A couple late evenings at work & away from the machines helped me take the scientific approach. Now I can order playfield stuff & clean it up.

Thanks for the help!