Microwave shows PF (power failure) after an outage or flicker; clock resets.

User-level steps:

• Reset the clock and settings according to the manual.
• Ensure the plug is fully inserted and not loose in the outlet.
• If PF appears frequently without known outages, test the outlet with another appliance or have an electrician check the circuit.

If the microwave otherwise operates normally, no internal repair is required.