I am going through a new to me Black Hole and need some help/advice.

All of the solenoids on the lower playfield work as well as everything on the main PF except the Pop bumpers and the upper sling shots. They do not register when pressed with the glass off which leads me to think it's at least partially a switch matrix issue. I know that the pops should fire with or without the switch matrix though. They are driven separately, correct?

Any help is appreciated!

-Hougie

I'll run the solenoid and switch tests later this afternoon.

I get no response from the two slings or any pop bumper during solenoid or switch tests.

I have pulled every board to do the ground mods and I have reseated all of the pop boards connectors.

I'm reading 1.3 DC volts on each pop bumper coil lug.