Self-tests 4 to 8: coils, switches, display, sound, coin door
Test 4 fires coils and relays Q1-Q32 (solenoids 0-31): right flipper picks, credit fires. Test 5 lists stuck-open switches, then shows any switch you close; credit re-lists. Test 6 is display test (right flipper advances). Test 7 plays eight tones with the right flipper. Test 8 checks the coin door switches.
Systems
Source: Repairing Gottlieb System 3 Electronic Pinball Games from 1989 to 1996, Clay Harrell (pinrepair.com)