As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED BOTH CABIN PRESS CONTROL INOPERATIVE. FLIGHT RETURNED & LANDED WITHOUT INCIDENT. PLACARDED BOTH PRESSURIZATION CONTROLLERS INOPERATIVE IAW MEL. REPLACED SPLICE S9-5J THAT WAS BURNED. SYS GND CHECKED NORMAL OPERATION CLOSED.