Well, Im at a loss here. I have been trying to bring back a Silverball mania back to life. I decided to just buy new boards since it was not much more than rebuilding the old boards with the upgrades. I bought weebly boards (MPU, Solenoid driver, sound and lamp driver). BEFORE I installed them I rebuilt the rectifier board. It was blowing the 10A fuse. Found that someone tied in the blue wire to the orange wire (Braided bus wires) under the playfield causing the fuse to blow. There was also a added wire from the left spinner - 1000 when lit to the the upper left Spot letter when lit lamp. I also removed that. No more blown fuse and all voltages are correct. First I installed the Solenoid driver board and checked voltages, all good. Then I installed the MPU and lamp driver board. Game boots up like it should. I then installed the sound board and all new displays (LED), awesome I can play a game It plays fine, ran through the test modes (switch and solenoid test fine) but I just had GI and a few locked on lights. So, I know I have new boards so I re-pinned the connectors that looked bad, they looked pretty good but did it anyways. Same result. I then started to look for some more hacks under the playfield, pulled all lights and check everything with my DMM. I dont see anything touching something that it shouldnt and didnt see any other hacks. On the back box my Same player shoots again, match and 2nd and 3rd "L" dont light. In test mode the rest flash as well as some controlled lights on the playfield but just the B,R,E,L,L by the stand up targets. The rest will not light in or out of test mode.
One thing to note: I only plugged one display in at first and took a picture to show a friend. Looking at that pic I did have controlled lights at that time.
So, I happen to have a working 6 Million Dollar man here and plugged in the new weebly lamp board and same thing, no playfield lights - NOW no lights even with the original lamp board. So my there is a problem with the new board and its screwing up the MPU.
First thing is that I need to get the 6MDM back up and running. I swapped out the 6821 chips at U10 and U11 since I had them, no change. This game is also all original hardware.
Any help here would be great for the 6MDM and then we can figure out whats going on with the Silverball mania board killer.
Thanks
Rob