Thought I'd throw this out here in this thread to see if anybody has any suggestions, I've got an Amazing Spiderman System 80 that locks up after it's sat in attract mode for 5 or 6 hours. I know that's not really that big of a deal, but it's still kind of weird, something is going on there.
Ni-Wumpf MPU Board
Ni-Wumpf Driver Board
Gulf Pinball Power Board
New capacitor in the transformer board
New bridge rectifier in the transformer board
Seperate grounds back to the power supply (ground mod)
The extra 2 wires added into the interconnect
CPU harness repinned (the 5 volt/ground connection from the power supply)
Game plays great no issues and all the boards are new except the sound board. Power supply voltage is at 5.05 and 5.04 on the cpu and driver....
It's just a little bit of an annoying issue, it wouldn't be able to be operated like that (as if anybody's still operating System 80's much).
It has a slight heat component to it, once it locks up if you turn it off and back on it immediately boots and plays fine... but it will lock up in a couple hours instead of 5 hours.
When it locks up it kind of just freezes where it is (in attract).... so the score displays are still lit, the lights on the playfield are still lit (whichever one was lit up)... it's as if the game has just frozen in the middle of the attract mode it's in. No coils or anything lock on, and the displays are legible and just look as if it's stopped where it was.
The Ni-Wumpf board is an early one, I think serial number in the 300's, it's one of the ones where they had to preprogram it to whatever game you wanted. These machines have so many ground issues and things I hate to bug Ace about it possibly being the MPU if somebody's seen something similar but I'm kind of running out of grounds to fix