A device drawer, expansion unit power supply is the failing item.
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 |
| 153 | 7311-D10 | 22R3958 | Power supply | Un-Ex |
| 153 | 7311-D11 | 22R3958 | Power supply | Un-Ex |
| 153 | 7311-D20 | 39J2781 | Power supply | Un-Ex |