As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN PRESSURIZATION CONTROLLER WENT BLANK DURING CRUISE FLIGHT. THE CONTROLLER REMAINED FUNCTIONAL AND CONTROLLED CABIN PRESSURE DURING THE REMAINDER OF FLIGHT. THE CONTROLLER REMAINED BLANK FOR THE REMAINING 04 HOURS OF THE FLIGHT AND IS STILL BLANK AFTER BLOCK IN AT THE GATE. GROUNDED - YES. ACCOMPLISHED B737-800 FIM 21-31 TASK 803. GROUND VERIFICATION CHECK OK - DEFECT CLEARED.