As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN FLIGHT, NOTICED THAT THE INDICATOR LIGHTS IN THE PRESSURIZATION CONTROL PANEL WERE ALL BLANK. PRESSURIZATION WORKED NORMAL- NO ISSUES. GROUNDED - YES. DIVERSION TIME 66 MINUTES. REPLACED CABIN PRESS CONT MODULE REF AMM 21-31-02-400-801. OPS CK OK OF PRESS SYS GND TEST REF AMM 21-31-00-700-802 & PRESS SYS MANUAL MODE TEST REF AMM 21-31-00-710-801 OPS CK OK ETOPS GROUND VERIFICATION COMPLETE.