I picked up a batman forever last week, and am gradually going through it. Everything is playing well, the occasional bat cave return ramp lip out (probably levelling issue). Tonight I noticed that I've never seen any of the back wall flash lamps go off, or the blue flash lamp behind the ramp. The under play field flashers work fine. Could this be something as simple as a disconnected cable? I did have to remove the head to move the machine, but can't find any spare cables to go to the boards.

I don't have a full schematic for the game yet to trace where they run to. I'll check the fuses and see if anything is disconnected on the backside of the Playfield area for the 5 bar.

Resolved. Loose connection on 2 of the bulbs. Easily sorted. Also a noob mistake, tried running the flasher test with the coin door open. Forgot about the high voltage disable on newer machines (90+)