What was found
CLIMBING TO FL360, RECEIVED ALTITUDE WARNING. TRIED CONTROL W/STDBY, NOTHING, MANUAL, NOTHING. BOTH PACKS IN AUTO, CABIN CLIMBED AGAIN. DECENDED TO 10,000 FT, C/W QRH, CONTINUED TO DESTINATION. TROUBLESHOT IAW AMM 21-31-00. REPLACED PRESSURE CONTROLLER. PERFORMED CHECK FLT & FOUND GOOD. TEAR DOWN OF PRESSURE CONTROLLER. CONTROLLER FAILED TEST. PC2 TRANSDUCER OUTPUT OUT. AUTO MODE RESET FUNCTION INOP. POWER MONITOR ADJUSTMENT OUT, IN AUTO & STANDBY MODES & AC ACTUATOR DRIVER ERRATIC. ON DISASSEMBLY, 1 BROKEN SCREW & LOOSE SCREWS SECURING INTERCONNECT BOARD. FOUND OPEN CIRCUITS, P1B-37 & P1B-19. TROUBLESHOT AC ACTUATOR. REPLACED TRANSISTORS Q2014, Q2016, Q2015, Q2011 & INSTALLED SB21-113.