32 V coils, bumpers and slingshots are weak or dead; the low-power solenoid voltage measures under 5 V DC instead of about 32 V.

Low-power solenoid voltage drops to under 5 V

Cause: Failed capacitor C8 (150 uF 100 V) on the power supply board.

Checks

• Measure the low-power solenoid voltage on the power supply.

Fix

• Replace C8 with a 150 uF 100 V capacitor, observing polarity.

Unplug the game before working on the transformer, line wiring or power supply board.

Systems

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

Related tips

• No or low +5 V from the power supply
• Power supply board versions are not interchangeable
• CPU won't boot, 5V collapses under load: replaced bridge not joined on the top side
• Power supply board versions and their +5 V filter capacitors
• Power supply CN1 pinout, pins 1-6
• Power supply CN1 pinout, pins 7-12
• Power supply gives no +5 V
• Won't boot, only some lamps on: bad capacitor joints on the power supply board

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