Flipper board LEDs show the cabinet buttons are seen

Each solid state flipper board has an LED per flipper that lights when its cabinet button is pressed with the game on, in any mode. If it lights, the board is getting the button signal.

Systems

• Data East CPU Version 1/2
• Data East CPU Version 3
• Data East/Sega CPU Version 3b

Games

• Adventures of Rocky and Bullwinkle and Friends
• Back to the Future
• Batman
• Batman Forever
• Baywatch
• Checkpoint
• Guns N' Roses
• Hook
• Jurassic Park
• Last Action Hero
• Lethal Weapon 3
• Mary Shelley's Frankenstein
• Maverick
• Phantom of the Opera
• Robocop
• Star Trek
• Star Wars
• Tales from the Crypt
• Teenage Mutant Ninja Turtles
• The Simpsons
• The Who's Tommy Pinball Wizard
• WWF Royal Rumble

Related tips

• Solid state flipper goes up but will not stay up
• Solid state flipper stays up only after the button is first pressed
• Flipper EOS switch role from Jurassic Park on
• Adapting a 520-5080-00 flipper board to non-EOS games
• Solid state flipper flutters when held
• Solid state flipper does not work: fuses and fuse clips
• Flipper stuck up with power on (Playboy and later)
• Flipper board torn up after raising the playfield

Source: Repairing DataEast 1987 (Laser War) to Sega 1995 (Batman Forever), Part Two, Clay Harrell (pinrepair.com)