At power-on the CPU controlled coils and most CPU lamps come on and stay on, and the game does not boot.

All coils and most CPU lamps lock on at power-up

Cause: The -12 V supply to the CPU board is missing (bad power supply section or bad connectors).

Checks

• Measure across CPU board C17 (below C16); expect -11.9 to -12.1 V.
• Check the TC3 jumper plug on the CPU board.

Fix

• Repair the -12 V section (CR3/CR4, C4, 7912 regulator) or the connector before going further.

Systems

• Gottlieb System 1

Related tips

• Power supply bring-up, step 2: CPU load
• System 1 power supply outputs
• Replacing power supply filter capacitor C1
• R21 value on early power supplies
• Power supply bring-up, step 1: inputs
• Power supply output connector pins
• Quick checks on the similar System 1 power supply
• Display high-voltage section of the power supply

Source: Gottlieb System 1 Pinball Repair from 1977 to 1980, Clay Harrell (pinrepair.com)