A fan might be failing. Before replacing any field replaceable units (FRUs), ensure that the fans and fan trays are fully seated into the fan connectors and that all cables are seated correctly.
Replace the FRUs in order, one at a time, starting with the primary unit and then the secondary units. Use the following table to determine the failing fan and location.
| Unit reference code, CCIN, or FFC | Type and model | Part number | Description | Location code |
| 7610, 7611 | 8203-E4A, 8261-E4S, 9407-M15, 9408-M25 | 39J4517 | Blower assembly | Un-A4 |
| 7620, 7621 | 8203-E4A, 8261-E4S, 9407-M15, 9408-M25 | 39J4517 | Blower assembly | Un-A3 |
| 7630, 7631 | 8203-E4A, 8261-E4S, 9407-M15, 9408-M25 | 39J4517 | Blower assembly | Un-A2 |
| 7640, 7641 | 8203-E4A, 8261-E4S, 9407-M15, 9408-M25 | 39J4517 | Blower assembly | Un-A1 |
| 7610, 7611 | 8204-E8A, 9409-M50 | 44V3454 | Processor cooling fan | Un-A1 |
| 7620, 7621 | 8204-E8A, 9409-M50 | 44V3454 | Processor cooling fan | Un-A2 |
| 7630, 7631 | 8204-E8A, 9409-M50 | 44V3454 | Processor cooling fan | Un-A3 |
| 7640, 7641 | 8204-E8A, 9409-M50 | 44V3454 | Processor cooling fan | Un-A4 |
| 7610, 7611 | 9406-MMA, 9117-MMA | 39J0859 | Fan assembly | Un-A1 |
| 7620, 7621 | 9406-MMA, 9117-MMA | 39J0859 | Fan assembly | Un-A2 |
| 7650, 7651 | 5790, 7311-D11 | 03N6069 | Fan assembly | Un-A1 |
| 7610, 7611 | 0595, 5095, 7310-D20 | 39J1176 | Fan assembly | Un-A1 |
| 7620, 7621 | 0595, 5095, 7310-D20 | 39J1176 | Fan assembly | Un-A2 |
| 7630, 7631 | 0595, 5095, 7310-D20 | 39J1176 | Fan assembly | Un-A3 |
| 7640, 7641 | 0595, 5095, 7310-D20 | 39J1176 | Fan assembly | Un-A4 |
| 7610, 7611 | 5094, 5096, 5294, 5296 | 39J5235 | Air-moving device (fan) | Un-B01 |
| 7620, 7621 | 5094, 5096, 5294, 5296 | 39J5235 | Air-moving device (fan) | Un-B02 |
| 7600 | 5802, 5877 | See Finding parts, locations, and addresses. | Air-moving device (fan) | Un-E1-A1 |
| 7601 | 5802, 5877 | See Finding parts, locations, and addresses. | Air-moving device (fan) | Un-E1-A2 |
| 7602 | 5802, 5877 | See Finding parts, locations, and addresses. | Air-moving device (fan) | Un-E2-A1 |
| 7603 | 5802, 5877 | See Finding parts, locations, and addresses. | Air-moving device (fan) | Un-E2-A2 |
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