The problem is an I/O bridge problem. See the following table for the FRU part number:
| CCIN | Description | Model, expansion unit, or unit type | Part number |
| 308 | System backplane | 8203-E4A, 9407-M15, 9408-M25 | 42R7898 |
| 308 | System backplane | 8204-E8A, 9409-M50 | 10N9369 |
| I/O backplane System processor backplane |
9117-MMA | 42R7352 03N6902 |