What was found
AFTER TAKEOFF, UNABLE TO CONTROL CABIN PRESSURIZATION USING AUTO, STANDBY OR MANUAL. AIRCRAFT RETURNED TO LAS AND MADE AN UNEVENTFUL LANDING. INSPECTED AND PERFORMED BITE TEST, ALL SYSTEMS NORMAL PER BOEING M/M. RIGHT PACK THEN TRIPPED ON GROUND AND WOULDN'T RESET. REPLACED TURBINE INLET SENSOR PER BOEING M/M.