Two-tone screech at switch-on is normal

Every System 3 game gives two short high-pitched squeals the moment power comes on. It means A5, fuses F10/F11, the speakers and both sound boards are working.

Systems

• Gottlieb System 3

Related tips

• Gottlieb System 3: loud screeching from the speakers: replace the sound board capacitors

Source: Repairing Gottlieb System 3 Electronic Pinball Games from 1989 to 1996, Clay Harrell (pinrepair.com)