I'm getting a little discouraged about my SST. It worked fine for the longest time then suddenly blew the mosfets for the magnets and brain bug.
I replaced Q5,Q6,Q7 and while I was at it replaced the leds on the two orbit octos (the would randomly start triggering constantly at times).
While it was sitting in switch test mode in diagnostics to verify the optos are working, I closed the coin door and then like 5-10 minutes later I hear a solenoid energize. I turn it off and on again to discover that the super vuk is now locked on immediately on poweron. I take the board out again (rotten dog driver board) and replace Q4 as well. I also replaced the diodes on the two magnets and super vuc while I was at it.
Put it all back together and play a couple of games. It seemed to work fine, I did notice the brain bug popped up and down at a couple of random times (I do not remember if that was normal or not) but then on probably the third game I notice the magnets stopped working again. This is where I am at. I haven't investigated further yet, but I'm going to assume Q5 and Q6, and probably Q7 are all blown again.
Any idea what might be the cause here? This is getting really frustrating as it seems to happen randomly, but permanently until I replace those chips.