Hello everyone, I am working on very much a disaster case of a Haunted House. To preface this, I have lots of experience working on pins, but VERY little working on Gottlieb systems. So I need some guidance.

I have a Haunted house that when I got to it, it was missing the MPU, SDB and the power board. And the A1/A3 harness was melted. So, for starters, I ordered and installed new Rottendog power supply, MPU and Driver Board. I also got the A1/A3 rebuild kit and rebuilt that as well.

Voltages seem to check out on the power board.
12 VDC = 14.01
5VDC = 5.04
60 VAC = 64.4
8VDC = 8.56

None of the LEDs on either the MPU or SDB come on. The machine will light up the GI and will run thru attract mode sounds when left on. This is all it does. No displays, best I can tell the MPU is not booting at all.

I also went through and ohm'd out all the coils and cut out two that were burnt up, prior to hooking up the boards.

I am at a loss currently and could use your guidance.

Thanks
Randy

I'm honestly starting to wonder if I have an issue with the new Rottendog MPU. I have had that twice before in the past, where a RD MPU came DOA.

I will double check that when I go back to their house. However, if memory serves me correct, I was NOT seeing voltage on the test points on the board.

As for buying different boards, that isn't really an option on this one, but I will remember it for any future cases where I need a new Gottlieb MPU. I have not had good experiences with Rotten Dog over all.

I am going to head back out there to check deeper into the issue in a few days hopefully. I will report back on my findings.

Unfortunately.. as fate would have it, they are as far away as I ever travel for repairs.. So I can't just drop in any time.

I sure wish I had known that before I ordered a full set of RD boards for it. But... on the next one.