Failing function code 203

A system power supply is the problem. Check the power supply LEDs to verify the location. Use the following table to determine the part number for the field replaceable unit (FRU):

CCIN or FFC Type and model Part number Description Location code
167 8204-E8A 44V3559 Power supply (ac) Un-E1
167 8204-E8A 42R6607 Power supply (dc) Un-E1
203 9117-MMA 39J2779 Power supply Un-Ex