Lenovo ThinkSystem SN550 - Page 4

Install a RAID adapter. . . . . . . . . . . 79
Storage cage replacement . . . . . . . . . . 81
Remove the storage cage . . . . . . . . . 81
Install the storage cage . . . . . . . . . . 82
System-board assembly replacement . . . . . . 82
Remove and replace the system-board
assembly . . . . . . . . . . . . . . . 82
Update the Universal Unique Identifier
(UUID). . . . . . . . . . . . . . . . . 86
Update the DMI/SMBIOS data . . . . . . . 88
Enable TPM/TCM . . . . . . . . . . . . 89
Enable UEFI Secure Boot . . . . . . . . . 91
Trusted Cryptographic Module (TCM)
replacement . . . . . . . . . . . . . . . . 92
Remove the Trusted Cryptographic Module
(TCM) . . . . . . . . . . . . . . . . . 92
Install the Trusted Cryptographic Module
(TCM) . . . . . . . . . . . . . . . . . 93
Chapter 4. Problem determination . . 95
Event logs . . . . . . . . . . . . . . . . . 95
Light path diagnostics . . . . . . . . . . . . 97
Viewing the light path diagnostics LEDs . . . 97
Light path diagnostics LEDs . . . . . . . . 99
System-board LEDs . . . . . . . . . . . 99
General problem determination procedures . . . . 100
Troubleshooting by symptom . . . . . . . . . 101
Hard disk drive problems . . . . . . . . . 101
Intermittent problems. . . . . . . . . . . 102
Memory problems . . . . . . . . . . . . 103
Network problems . . . . . . . . . . . . 103
Observable problems. . . . . . . . . . . 110
Optional-device problems . . . . . . . . . 111
Performance problems . . . . . . . . . . 113
Power on and power off problems . . . . . . 113
Software problems. . . . . . . . . . . . 114
Appendix A. Getting help and
technical assistance . . . . . . . . . . 117
Before you call . . . . . . . . . . . . . . . 117
Collecting service data . . . . . . . . . . . . 118
Contacting Support . . . . . . . . . . . . . 119
Appendix B. Notices. . . . . . . . . . 121
Trademarks . . . . . . . . . . . . . . . . 122
Important notes . . . . . . . . . . . . . . . 122
Particulate contamination . . . . . . . . . . . 122
Telecommunication regulatory statement. . . . . 123
Electronic emission notices . . . . . . . . . . 123
Taiwan BSMI RoHS declaration . . . . . . . 124
Taiwan import and export contact information . . . 124
Index . . . . . . . . . . . . . . . . . . 125
ii ThinkSystem SN550 Compute Node Maintenance Manual