The blinders do not work although voltages, continuity and the small driver board check out.

Tommy: blinders dead with good voltages and wiring

Cause: The blinder board on the left of the cabinet (a shaker motor board design) is held off by its J2 connector.

Checks

• Find connector J2 on the blinder board.

Fix

• Unplug J2.

Systems

• Data East/Sega CPU Version 3b

Games

• The Who's Tommy Pinball Wizard

Related tips

• Tommy: blinders do not move (servo motor)
• Tommy: quick blinder test using expert mode
• Tommy: adjust the blinder open and closed positions
• Tommy: blinder servo board never activates
• Tommy: CPU and display EPROM types and latest versions

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