Install the backplane for eight 2.5-inch hot-
swap drives . . . . . . . . . . . . . . 116
Remove the backplane for four 3.5-inch hot-
swap drives . . . . . . . . . . . . . . 117
Install the backplane for four 3.5-inch hot-
swap drives . . . . . . . . . . . . . . 118
Expansion drive cage replacement . . . . . . . 119
Remove the expansion drive cage . . . . . . 120
Install the expansion drive cage. . . . . . . 121
DIMM replacement . . . . . . . . . . . . . 122
Remove a DIMM. . . . . . . . . . . . . 122
DIMM installation rules . . . . . . . . . . 124
Install a DIMM . . . . . . . . . . . . . 128
PCIe adapter retainer replacement . . . . . . . 129
Remove the PCIe adapter retainer . . . . . . 129
Install the PCIe adapter retainer. . . . . . . 130
PCIe adapter replacement. . . . . . . . . . . 131
Remove a PCIe adapter . . . . . . . . . . 131
Install a PCIe adapter . . . . . . . . . . . 132
CMOS battery replacement . . . . . . . . . . 134
Remove the CMOS battery . . . . . . . . 134
Install the CMOS battery . . . . . . . . . 136
Serial port module replacement . . . . . . . . 138
Remove the serial port module . . . . . . . 138
Install the serial port module . . . . . . . . 139
M.2 backplane and M.2 drive replacement . . . . 140
Remove the M.2 backplane and M.2 drive. . . 140
Adjust the retainer on the M.2 backplane . . . 142
Install the M.2 backplane and M.2 drive. . . . 143
TCM/TPM adapter replacement (for Chinese
Mainland only) . . . . . . . . . . . . . . . 146
Remove the TCM/TPM adapter (for Chinese
Mainland only) . . . . . . . . . . . . . 146
Install the TCM/TPM adapter (for Chinese
Mainland only) . . . . . . . . . . . . . 147
Intrusion switch replacement . . . . . . . . . 149
Remove the intrusion switch . . . . . . . . 149
Install the intrusion switch . . . . . . . . . 149
Fixed power supply replacement . . . . . . . . 150
Remove the fixed power supply. . . . . . . 150
Install the fixed power supply. . . . . . . . 154
Hot-swap power supply replacement . . . . . . 157
Remove a hot-swap power supply. . . . . . 157
Install a hot-swap power supply . . . . . . 160
Power interface board replacement . . . . . . . 164
Remove the power interface board . . . . . 164
Install the power interface board . . . . . . 165
Hot-swap power supply cage replacement . . . . 166
Remove the hot-swap power supply cage. . . 166
Install the hot-swap power supply cage. . . . 167
Processor and heat sink replacement . . . . . . 169
Remove a processor and heat sink . . . . . 169
Install a processor and heat sink . . . . . . 172
System board replacement . . . . . . . . . . 177
Remove the system board . . . . . . . . . 178
Install the system board . . . . . . . . . . 180
Update the machine type and serial
number . . . . . . . . . . . . . . . . 181
Enable TPM/TCM . . . . . . . . . . . . 182
Enable UEFI Secure Boot . . . . . . . . . 186
Complete the parts replacement . . . . . . . . 186
Chapter 4. Problem
determination . . . . . . . . . . . . . 189
Event logs . . . . . . . . . . . . . . . . . 189
General problem determination procedures . . . . 191
Resolving suspected power problems . . . . 191
Resolving suspected Ethernet controller
problems . . . . . . . . . . . . . . . 192
Troubleshooting by symptom . . . . . . . . . 192
Power on and power off problems . . . . . . 193
Memory problems . . . . . . . . . . . . 194
Hard disk drive problems . . . . . . . . . 195
Monitor and video problems . . . . . . . . 197
Keyboard, mouse, or USB-device
problems . . . . . . . . . . . . . . . 198
Optional-device problems . . . . . . . . . 199
Serial-device problems . . . . . . . . . . 201
Intermittent problems. . . . . . . . . . . 201
Power problems . . . . . . . . . . . . . 202
Network problems . . . . . . . . . . . . 202
Observable problems. . . . . . . . . . . 203
Software problems. . . . . . . . . . . . 205
Appendix A. Getting help and
technical assistance . . . . . . . . . . 207
Before you call . . . . . . . . . . . . . . . 207
Collecting service data . . . . . . . . . . . . 208
Contacting Support . . . . . . . . . . . . . 209
Appendix B. Notices. . . . . . . . . . 211
Trademarks . . . . . . . . . . . . . . . . 212
Important notes . . . . . . . . . . . . . . . 212
Telecommunication regulatory statement. . . . . 212
Electronic emission notices . . . . . . . . . . 213
Taiwan Region BSMI RoHS declaration. . . . 213
Taiwan Region import and export contact
information . . . . . . . . . . . . . . . . 213
Index . . . . . . . . . . . . . . . . . . 215
ii ThinkSystem ST550 Maintenance Manual
