So Indy started giving me some trouble the other day. The game was on, and had been on for 3-4 hours, I was in another room and heard a ruckus. When I got to the game room I saw the Indy display was off and the solenoids were going nuts. I had company at the time so I just turned it off. The next day, upon further inspection fuse F116 was burnt. Changed the fuse, played a few games and walked away. 3-4 hours latter another ruckus and F116 was burnt again.
I have a color DMD and Pinsound in the game, and I'm aware that some have had problems with F116 while running both of those in a machine. But it's been this way for the last 6 weeks since I finished restoring the game, and I've had it on for extended periods of time a lot. So why all of a sudden is it blowing fuses? I have no problem going the separate power supply route for the DMD and/or Pinsound, and probably will do so regardless, but is there anything else I should be looking at that might be causing F116 to blow? It seems odd to me that it would start doing this when it was fine before and I'm concerned I may be overlooking the root problem by just adding a separate power supply. Maybe it's as simple as the power board finally crossed the threshold into old age and doesn't like the strain anymore. BTW, voltage at TP1 is only 11.78v while the machine is on in attract mode. Any ideas?