As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ROUTINE MX INSPECTION, IT WAS DISCOVERED ALL THE EMERGENCY LIGHTS ILLUMINATED WITH SWITCH IN THE ARM POSITION. MX R & R DIODE CR0220 AND THE F/A CONTROL PANEL IAW WM 28-23-50 AND 25-27-09 WITH OPS CHECKED SUCCESSFULLY. ACFT WAS APPROVED FOR RETURNED TO SERVICE.