A power supply in an expansion unit might be failing.
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 |
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