Hello everyone,

After many years of wanting to get into collecting pinballs, I finally did it. Purchased a Bally Mr and Ms. Pacman. Got it for $100, PF is very nice, cabinet needs a paint job but is solid. Back glass is perfect. The MPU is shot... and i mean bad. I have ordered a replacement unit which should be here shortly.

Been doing a lot of reading and testing and things seem to be in good condition. Here is my concern. When the PO powered it up to show me, 1 PF light came on and the score displays did a little as well... Thats all it does. Nothing else.....

Is this completely related to the acid killed MPU or do I have other issues that need to be looked at before install the new MPU? Please forgive for give me if this is a stupid question, but new to the hobby.

Thanks!!

Thanks! I will trace out the GI circuit and see what I find. I have cleaned the power module and verify all the fuses are good and the correct value. I found a guide on the bally machines that had some pretty good info on what to do before turning a machine on.

I follow the steps for the power supply check, most voltages were within spec, some were a little high.

I will work on the GI circuit till my new ultimate board comes in.

Thanks again!!