Baywatch and Batman Forever: reaching the switch and lamp tests

These two games have the icon-based service menu. Press the black button inside the coin door, scroll with the flipper buttons to the "diag" icon and select it with start. The switch test is called "TST" and shows the switch wiring, CPU connector, wire colours and even the column transistor for each switch.

Systems

• Data East/Sega CPU Version 3b

Games

• Batman Forever
• Baywatch

Related tips

• Using the Portals service menu (Baywatch and Batman Forever)
• Batman Forever: CPU and display EPROM types and latest versions
• Which Sega games use optical switches
• Ball trough optos from Baywatch on
• Two flipper boards on WWF Royal Rumble and Baywatch
• Find a bad trough switch with Easy Trough Clear
• Trough roller switch diodes get crushed
• Flipper EOS switch role from Jurassic Park on

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