The problem is an I/O drawer power supply problem. 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 |
| 289 | 7311-D10 | 22R3958 | Power supply | Un-P1 |
| 289 | 7311-D11 | 22R3958 | Power supply | Un-P1 |
| 289 | 7311-D20 | 39J2781 | Power supply | Un-P1 |