A tingle or shock when the player's hands touch both buttons at once.

Shock from Gottlieb metal flipper buttons

Cause: Gottlieb fitted metal flipper buttons from 1960 well into the 1970s. Fish paper insulates the metal actuator from the 30 V flipper switches; when it wears through, the button touches a live blade.

Checks

• Inspect the fish paper on each cabinet flipper switch.

Fix

• Replace the fish paper (electrical tape works in a pinch).

Systems

• Electro-mechanical

Related tips

• Gottlieb EM flipper rebuild parts
• Replace metal flipper links with bakelite
• Stronger flipper coils for Gottlieb EMs
• Gottlieb large flipper coils by wrapper colour
• Gottlieb flipper coil windings (power/hold)
• Gottlieb yellow-dot A-5141 flipper coils
• Gottlieb high-power "yellow dot" flipper coils
• Gottlieb and post-1962 Williams EM flipper coil strengths (30 V)

Source: Repairing Electro-Mechanical (EM) Coin Operated Games to 1978, Part Two, Clay Harrell (pinrepair.com)