As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PREFLIGHT, DISCOVERED PRESSURIZATION AUTO FAILED AND ALTERNATE LIGHTS ON. ACFT GROUNDED. THE MODE SELECTOR SWITCH REPOSITIONED TO MAN AND BACK TO AUTO, AUTO FAIL LIGHT EXTINGUISHED. NO PREVIOUS HISTORY LAST 30 DAYS, CHECKED GOOD FOR SERVICE.