Hi there,

I have a Pharaoh pinball machine, bought quite a while ago. More recently I had to replace the MPU and Driver boards. I got replacements from Kohout, those didn't work so they replaced those. Sadly it's beyond warranty now. The power supply, sound, and display boards are stock.

Symptoms: no solenoids work, except flippers and relays. IC1 gets very warm. In solenoid test almost all leds in array for "solenoid driver 1/2" blink for each failed solenoid tested, when a relay is activated, only the correct led on array lights. The LEDs for flipper driver stay on. Background music stops after 5 seconds. It forgot settings, although doesn't require battery. Knightside witnessed this too.

Dx: I triple checked the DIP switches. nReset and blanking LEDs are on as they should. Board dx will return a "0" although on occasion has returned "9". Switches seem to work.

I think the MPU board is bad.

Thanks,
Mattwesterville

pins4u

I have depression and memory issues as I get shock therapy. It took nearly an hour to write that. You are correct I do have little knowledge, thats why im seeking help.
I don't make any claims to be smart, an expert, or better and I'll admit when I'm wrong freely. I am wrong often.

I could drop insults here but I deleted them, and it would be nice if everyone would pause before posting something derogatory.

Anyhow I got a guy looking at it tomorrow morning who is a professional. He is also looking at my #high speed machine, so I wanted maybe to save $ and get an answer here.