After lifting the playfield, the game boots normally but no coils fire, not even the flippers, although the coils show voltage.

No coils at all after lifting the playfield: reseat cabinet-to-head plugs

Cause: One of the connectors between the cabinet and the backbox head was not fully latched and lifting the playfield pulled it loose.

Checks

• Check every board connector in the backbox.
• Check the connectors that join the cabinet wiring to the head, making sure each one is fully seated and latched.

Fix

• Reseat and latch the loose cabinet-to-head connector.

Systems

• Stern MPU-200

Games

• Cheetah

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