I'm trying to bring a Stars back to life. It was sick when I bought it. MPU board had severe corrosion damage, so it's been replaced with an Alltek board. Upon startup, I get the proper flashes from the LED. It seems like I can start a game, but not a single solenoid will fire. I'm considering replacing the power supply and driver boards, but I'm scared that it still may not solve the problem...
UPDATE: I did replace the rectifier and solenoid driver boards... ALLTEK mpu board is new as well.
HERE'S WHAT I KNOW:
-Still getting the proper flashes on the mpu.
-All led indications and cyclone led's on ultimate driver board are proper.
-All voltages on test points are reading as they should, except TP3 on the rectifier board is reading 18Vdc (should be 12), but I'm not sure what to make of that.
-All coils have 43Vdc going to them
-I have verified dipswitches and jumpers on the Alltek board are correct.
-The 1amp slo-blo fuse under the playfield is NOT blown (otherwise I wouldn't have power to the coils, right?)
-When I start a game, all switches will score points except for one. The switch checks out with a dmm, and the wire has good continuity going to the connector.
-All other wiring looks intact, and I'm basically using the "hunt and peck" method at this point. The connectors that haven't been replaced don't appear to be degraded. No green or blue corrosion. I haven't checked them all yet, but am doing my best to test them.
Any and all advice will be investigated, and is really appreciated. I know that troubleshooting over the interwebs is more thankless than doing it on your own machine, and I am very grateful to you all. This is driving me crazy. I've got a lot invested in this machine and really want to play it, and move on to other projects...