Reading the WPC test report

If the diagnostics find a problem at power-on, the game shows a test report notice; press Begin Test to see each item. Most entries are switches that haven't closed in 30 games, which may simply be rarely hit. Close the switch by hand in switch edge test: if it works, its counter resets and it drops off the report.

Systems

• WPC Alpha-Numeric
• WPC Dot Matrix
• WPC Fliptronics
• WPC DCS
• WPC-Security (WPC-S)
• WPC-95

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