As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACFT WAS ON THE GROUND AND "ELEC" LIGHT WAS ILLUMINATED ON THE ELECTRIC METERS, BATTERY AND GALLEY POWER MODULE. BITE CHECK ON POWER MODULE P5-13, INDICATED SPCU INOP. R & R STANDBY POWER CONTROL UNIT. OPS CHECK NORMAL WITH NO MX MESSAGES OR LIGHTS.