What was found
DURING CLIMBOUT, NOTICED THE AIRCRAFT WAS NOT PRESSURIZING NORMALLY. LEVELED OFF AT FL10, BUT THE CABIN ALTITUDE CLIMBED TO 10 000. RAN PROCEDURES IN THE QRH FOR CABIN ALTITUDE. REQUESTED FL80 AND CABIN ALTITUDE DESCENDED TO 8000. TRIED MODE SELECT AUTO 1 AND MANUAL TO GET THE AIRCRAFT TO PRESSURIZE NORMALLY BUT NEITHER WORKED. THE CABIN PRESSURE STAYED AT 0 PSI. CONTROLLER REMOVED AND REPLACED IAW AMM 21-31-02-4-0, FOUND BAD FROM STOCK FOR NO POWER, ORIGINAL CONTROLLER REINSTALLED, TESTED AND RESET PERFORMED IAW AMM 21-31-00-5. NO FAULT FOUND. CPC SYS NR 1 IS NOW OPS GOOD. OPS CHECKED IN MANUAL MODE IAW AMM 21-31-00-5 OK.