As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT, CABIN WOULD NOT PRESSURIZE IN AUTO OR MANUAL MODE. AFTER ENGINE START NOTICED LEFT BLEED CLOSED LIGHT WAS DIFFICULT TO EXTINGUISH. FLIPPED THE BLEED SWITCH SEVERAL TIMES BEFORE LIGHT WOULD EXTINGUISH. RETURNED TO SGU. REMOVED AND REPLACED LEFT BLEED SHUT OFF VALVE IAW MM 25-30-00, OPS CHECKS GOOD.