As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLIMBING THROUGH 22,000 CABIN ALT LIGHT ON MAP. CABIN WOULD NOT RESPOND IN AUTO. SWITCH TO MANUAL, WOULD NOT RESPOND. AFTER ABOUT 30 SECONDS CABIN STARTED DESCENDING. DIVERTED FROM STS TO SFO.SECURED INSULATION ON AFT PRESSURE BULKHEAD AND REPOSITIONED BONDING STRAPS ON PNEUMATIC AND ELECTROPNEUMATIC VALVES. OPS CHECK GOOD.