The text is right but the display is very bright or flickers.
Display correct but too bright or flickering
Cause: Faulty power supply board.
Fix
- Repair the high-voltage section of the power supply board.
The display supply runs at about +100 V and -100 V; switch off before touching the display or its driver board.
Systems
Related tips
- Displays blank but the game plays
- Displays show only three or four digits at a time in a slow wipe
- Lower the display voltage to 91 V to extend display life
- Score displays weak, dim or dead with fuses good
- High-voltage fuse blows once the display connector is plugged back in
- When BR1 fails, replace C10 too
- Fix the display short before trusting a rebuilt supply
- Measure a rebuilt supply before reconnecting the displays
Source: Pinball Machines: How They Work & Troubleshooting, Norbert Snicer