Early stuck switch test only shows the lowest switch

On early 6803 games the stuck switch test does not report switches numbered above a stuck one until the lower one is fixed, so clear stuck switches in number order.

Systems

• Bally 6803

Related tips

• Later games check for stuck switches at power-on
• Why strobe 5 needs its jumper when it has switches
• Keypad keys are switch matrix crossings
• Switch matrix connector voltages under the test EPROM

Source: Repairing Bally 6803 Pinball Games from 1985 to 1989, Clay Harrell (pinrepair.com)