The flipper lingers up a moment after letting go.

Flipper stays up briefly after the button is released

Cause: The plastic opto activator by the button has lost its spring and returns slowly.

Checks

• Watch the activator return when the button is released.

Fix

• Replace the plastic flipper activator; a rubber band across its back gives extra tension as a stopgap.

Systems

• WPC Fliptronics
• WPC DCS
• WPC-Security (WPC-S)
• WPC-95

Related tips

• Fliptronics: flipper will not hold up (flutters)
• Fliptronics: flipper button does not register in switch test
• Fliptronics: flipper coil gets hot after a while of play
• Fliptronics flipper does not work: test the flipper opto board
• One flipper dead and its button fails switch test: dirty flipper button opto board
• Fliptronics and WPC-95: weak flipper
• Flipper stuck up but drops when the power goes off
• Upper flipper sometimes weak, then buttons dead after cleaning: replace the flipper optos

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