I just bought a laser war with special solenoid issues. The pop bumpers and the slingshots do not work. It has a new Rottendog cpu board in it. I sent the board to a repair shop and they say there is nothing wrong with it. I did the test to check the board by removing cn18 and grounding the pins with an alligator clip and the coils all fired. I tested the smig board under the playfield and that also tested good. Does anyone have any other ways to check them or have an idea where the problem may be? Thanks Bill

I'll have to check that. I have not yet done that. I'll get back to you after I check it. Thanks

In active switch test I tested the majority of the switches and they showed good. The pop bumper and the sling shots did not register. I guess the mpu is not seeing them. Could it be the white ground that is common to both of them is broken somewhere?

Yes I do have 32 volts at the coils.

About the switches, I meant to say they all check good except the sling shot and Pop bumpers.

I found the problem. Connector 4m/F2 was corroded and there is another connector 2F/M2 that is in-between 4M/F2 and the power supply that was also corroded. It was the white ground wire that is common to all the pops and slings that was giving all the problems. Thank you for all the input, it headed me in the right direction to find the problem. Bill