Brightening a display from the game's own supply

Steps

• Game off. Remove the display to be treated.
• Preferred: clip leads from a coin door lamp socket (6.3 V AC) to the two outer pins of the display glass.
• Alternative: clip to the big +12 V filter capacitor on the cabinet floor.
• Turn the game on. On 6.3 V AC leave it a minute or two; on 12 V only 5 to 30 seconds.
• Turn off, remove the clips and refit the display.

The fuse panel and transformer area carry wall voltage whenever the game is plugged in; unplug it before changing line-side parts.

Systems

• Gottlieb System 80
• Gottlieb System 80A

Related tips

• Display fault: board or display?
• Guarding the fill tip on the back of a score display
• Gottlieb Futaba displays run on low voltage
• Missing segment on one or more score displays
• Missing digit on one or more score displays
• One six-digit display completely dead
• Gottlieb System 80: bottom segment missing on one display that follows it: replace Z1
• Display chips on the CPU board fail after swapping displays

Source: Repairing & Upgrading Gottlieb System 80 Pinballs from 1980 to 1989, Part Two, Clay Harrell (pinrepair.com)