What was found
AUTO FAIL AND ALTITUDE LIGHTS ILLUMINATED ON PRESSURE CONT PANEL. ACFT GROUNDED. NR 2 CABIN PRESSURE CONTROLLER WITH SELECTOR PANEL LRU FAIL CODE 101, IAW FIM 21-31, TASK 827. FAULT ISOLATION IAW FIM 21-31, TASK 803 RESULTS IN NO FAULT CODES, NO FURTHER MX REQUIRED, BITE TESTED NORMAL IAW FIM 21-31, TASK 801. ETOPS SIGNIFICANT SYS, GROUND VERIFICATION SUCCESSFUL.