Starting a game does nothing useful: no ball comes to the shooter lane and the flippers don't work, until the game is reset to attract mode.

No ball served and flippers dead after start: tilt switch closed, tilt lamp out

Cause: The tilt switch was closed, so the game was tilted immediately; the tilt lamp was burnt out, which hid the tilt.

Checks

• Unplug the playfield switch connector and see which switch the self test still reports closed.
• Check the tilt bob and other tilt switches.
• Replace the tilt lamp so a tilt is visible.

Fix

• Clear or adjust the closed tilt switch and replace the tilt lamp.

Systems

• Bally 6803

Games

• Eight Ball Champ

Related tips

• Keypad keys are switch matrix crossings
• A missing keypad locks you out of the menus
• Build a replacement keypad
• Flipper switch shorting into the lane change switch
• Double EOS switches drive the upper flipper
• Switch column 5 dead after swapping in a CPU board

Source: Pinball Repair help group!! (Facebook group)