As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTO FAIL LIGHT & ALTN LIGHT ILLUMINATED ON PRESSURIZATION PANEL. ACFT GROUNDED. PERFORMED PRESS CONTROL MANUAL MODE TEST IAW AMM 21-31-00. ALL FAIL LIGHTS INDICATION NORMAL. NO FAULT LIGHTS NOTED. OK FOR CONTINUED SERVICE. FAULT OCCURRED AT POWER TRANSFER.