Remove a memory module .  .  .  .  .  .  .  .  125
Memory module installation rules .  .  .  .  .  .  126
Install a memory module .  .  .  .  .  .  .  .  .  130
LOM adapter replacement .  .  .  .  .  .  .  .  .  .  132
Remove the LOM adapter .  .  .  .  .  .  .  .  .  132
Install the LOM adapter .  .  .  .  .  .  .  .  .  .  133
M.2 backplane and M.2 drive replacement .  .  .  .  134
Remove the M.2 backplane and M.2 drive.  .  .  134
Install the M.2 backplane and M.2 drive.  .  .  .  137
Adjust the retainer on the M.2 backplane .  .  .  140
TCM/TPM adapter replacement (for Chinese 
Mainland only) .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  140
Remove the TCM/TPM adapter (for Chinese 
Mainland only) .  .  .  .  .  .  .  .  .  .  .  .  .  141
Install the TCM/TPM adapter (for Chinese 
Mainland only) .  .  .  .  .  .  .  .  .  .  .  .  .  142
Processor and heat sink replacement .  .  .  .  .  .  143
Remove a processor and heat sink .  .  .  .  .  144
Install a processor and heat sink .  .  .  .  .  .  147
CMOS battery replacement .  .  .  .  .  .  .  .  .  .  151
Remove the CMOS battery .  .  .  .  .  .  .  .  151
Install the CMOS battery .  .  .  .  .  .  .  .  .  153
System board replacement .  .  .  .  .  .  .  .  .  .  155
Remove the system board .  .  .  .  .  .  .  .  .  156
Install the system board .  .  .  .  .  .  .  .  .  .  157
Update the machine type and serial  
number .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  159
Enable TPM/TCM .  .  .  .  .  .  .  .  .  .  .  .  160
Enable UEFI Secure Boot .  .  .  .  .  .  .  .  .  164
Complete the parts replacement .  .  .  .  .  .  .  .  164
Chapter 4.  Problem  
determination .  .  .  .  .  .  .  .  .  .  .  .  . 167
Event logs .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  167
General problem determination procedures .  .  .  .  169
Resolving suspected power problems .  .  .  .  169
Resolving suspected Ethernet controller  
problems .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  170
Troubleshooting by symptom .  .  .  .  .  .  .  .  .  170
Power on and power off problems .  .  .  .  .  .  171
Memory problems .  .  .  .  .  .  .  .  .  .  .  .  172
Hard disk drive problems .  .  .  .  .  .  .  .  .  173
Monitor and video problems .  .  .  .  .  .  .  .  175
Keyboard, mouse, or USB-device  
problems .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  176
Optional-device problems .  .  .  .  .  .  .  .  .  177
Serial-device problems .  .  .  .  .  .  .  .  .  .  179
Intermittent problems.  .  .  .  .  .  .  .  .  .  .  179
Power problems .  .  .  .  .  .  .  .  .  .  .  .  .  180
Network problems .  .  .  .  .  .  .  .  .  .  .  .  180
Observable problems.  .  .  .  .  .  .  .  .  .  .  181
Software problems.  .  .  .  .  .  .  .  .  .  .  .  183
Appendix A.  Getting help and 
technical assistance .  .  .  .  .  .  .  .  .  . 185
Before you call .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  185
Collecting service data .  .  .  .  .  .  .  .  .  .  .  .  186
Contacting Support .  .  .  .  .  .  .  .  .  .  .  .  .  187
Appendix B.  Notices.  .  .  .  .  .  .  .  .  . 189
Trademarks .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  190
Important notes .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  190
Telecommunication regulatory statement.  .  .  .  .  190
Electronic emission notices .  .  .  .  .  .  .  .  .  .  191
Taiwan BSMI RoHS declaration .  .  .  .  .  .  .  191
Taiwan import and export contact information .  .  .  191
Index .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 193
ii ThinkSystem SR550 Maintenance Manual