As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AC VOLTS ARE NOT INDICATING ON OVERHEAD ROTARY KNOB PANEL. REMOVED AND REINSTATED POWER TO ACFT AND INDICATIONS NORMAL. CYCLED POWER FROM ALTERNATE ACFT SOURCES AND NO FURTHER DISCRAPENCIES NOTED. PERFORMED ELECTRICAL METER POWER MODULE GROUND VERIFICATION TEST IAW TASK 24-21-53-400-801 WITH NO FAULTS.