As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMBOUT OF DEN, UNABLE TO CONTROL CABIN PRESSURE IN ANY MODE. FLIGHT RETURNED TO DEN. REPLACED CABIN PRESSURE CONTROLLER AND LANDING GEAR ACCESSORY UNIT. LATER MAINTENANCE REPAIRED LEAKAGE AT FORWARD AND AFT CARGO DOORS AND REPLACED LT PACK FLOW CONTROL AND SHUTOFF VALVE, LT PACK SWITCH AND RELAYS R124 AND R589.