As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAIN'S AND JUMPSEAT VHF COMMUNICATIONS FAILED EN ROUTE ONT-MSP. FLIGHT DIVERTED TO DEN AND LANDED WITHOUT INCIDENT. FOUND MICROPHONES ON BOTH COMMS INOPERATIVE. REPLACED MICROPHONES AND OPERATIONAL CHECK OK, AIRCRAFT RETURNED TO SERVICE.