As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - ON FLIGHT 2290, RETURNED TO GATE, UNABLE TO GET ANY AIR FLOW FROM BLEEDS 1 OR 2 (APU BLEED DID NOT SEEM TO WORK EITHER). CLEANED AND RESEATED CONNECTOR TO PACK FLOW CONTROL VALVE. BLEED AIR SYSTEM OPERATIONAL CHECKS GOOD. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.