Pressing the right button during a game locks both right flippers up; they release only when the left button is pressed. Can also happen on the left side.

Addams Family: both right flippers stick up until the left button is pressed

Cause: Missing or broken diodes on the right flipper coils (both on one coil, or one on each) upset the Fliptronics I board. A bad diode can also kill the Fliptronics I hold TIP102.

Checks

• Check the diodes on both right flipper coils and the left coil.

Fix

• Replace damaged or missing diodes.
• If it persists, test and replace the hold TIP102 on the Fliptronics board.

Systems

• WPC Fliptronics

Games

• The Addams Family

Related tips

• Getaway: beacon runs nonstop in test and driver board C11 overheats
• Twilight Zone: diode mod to cool the clock with stock bulbs
• Game reboots when the flipper buttons are pressed
• Reset or lock-up only when one device fires
• Random resets or lock-ups during play: broken flipper coil diodes
• Fliptronics: flipper will not hold up (flutters)
• Fliptronics flipper coil wired wrongly
• STNG: diverter coils lock on during play

Source: Repairing Williams/Bally WPC Pinball Games from 1990 to 1999, Part Two, Clay Harrell (pinrepair.com)