The problem is an 18.2 GB LVD 68-pin SCSI disk drive.
See the following table for the FRU part number.
| CCIN or FFC | Type and model | Part number | Description | Location code |
| 623 | Any | 07N3674, 03N3874, 31L8770 | 18.2 GB LVD 68-pin SCSI disk drive, 18.2 GB LVD 68-pin drive and carrier (U2), 18.2 GB LVD 68-pin drive and carrier (SP) | Un-Px-Dx |