The top rollover lamps are behaving strangely on my corvette. When a skill shot/super skillshot is available the lamps flicker strangely, the lamp that is supposed to be lit flashes as it should but the other 2 randomly flicker. I noticed it was a bit iffy before I LED'd the machine, thinking it was just a dodgy connection, however having just fitted all comet non ghosting LEd's and reflowing the pins on a few lamp boards it now really stands out. The strangest thing is as soon as the skillshot isn't available, i.e. Any playfield switch has been hit or even when ball save puts the ball back in the shooter lane, the flickering stops and the lamps perform perfectly. Just to eliminate the LED's I put some normal incandescent lamps back in but its still the same although not as obvious as the lamps warm up/fade on and off which hides the flicker somewhat.
The 3 lamps are on the same column of the lamp matrix but all the others in that column perform fine. Diodes on that light board test fine.
Of course the hard to explain thing is that they only flicker when a skillshot is available.
Anyone have any idea whats going on here?