Quoted from MovieMark:Okey dokey - so I checked all of my fuses and everything checked out A-Okay. I played a game and low and behold all but one of the Backbox #89 bulbs started flashing so that's something! Now the Playfield TV #89 and the two Lightning Bolt #89s didn't flash, but I'm wondering if they only come on when you've completed all of the "Tales of Terror" (which I haven't done yet as my game was set to 'Extra Hard' which I've fixed). Anyway, any info regarding these Flashers are much appreciated!
Did you pull fuses and test with meter or simply look at them?