Lenovo 7X18 Maintenance Manual page 4

Install the security bezel . . . . . . . . . . 125
System board air baffle and the power interposer
replacement . . . . . . . . . . . . . . . . 126
Remove the system board air baffle and the
power interposer . . . . . . . . . . . . 126
Install the system board air baffle and the
power interposer . . . . . . . . . . . . 128
System board replacement . . . . . . . . . . 130
Remove the system board . . . . . . . . . 130
Install the system board . . . . . . . . . . 132
Update the machine type and serial
number . . . . . . . . . . . . . . . . 134
Enable TPM/TCM . . . . . . . . . . . . 136
Enable UEFI Secure Boot . . . . . . . . . 139
TCM/TPM adapter replacement . . . . . . . . 140
Remove the TCM/TPM adapter (for Chinese
Mainland only) . . . . . . . . . . . . . 140
Install the TCM/TPM adapter (for Chinese
Mainland only) . . . . . . . . . . . . . 142
Top cover replacement . . . . . . . . . . . . 144
Remove the top cover . . . . . . . . . . 145
Install the top cover . . . . . . . . . . . 146
Complete the parts replacement . . . . . . . . 147
Chapter 4. Problem
determination . . . . . . . . . . . . . 149
Event logs . . . . . . . . . . . . . . . . . 149
Light path diagnostics . . . . . . . . . . . . 150
Power supply LEDs . . . . . . . . . . . 151
System-board LEDs . . . . . . . . . . . 154
General problem determination procedures . . . . 155
Resolving suspected power problems . . . . 155
Resolving suspected Ethernet controller
problems . . . . . . . . . . . . . . . 156
Troubleshooting by symptom . . . . . . . . . 157
Hard disk drive problems . . . . . . . . . 157
Fan problems . . . . . . . . . . . . . . 159
ThinkSystem SR850 Maintenance Manual
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Intermittent problems . . . . . . . . . . . 159
Keyboard, mouse, KVM switch or USB-device
problems . . . . . . . . . . . . . . . 160
Memory problems . . . . . . . . . . . . 161
Monitor and video problems . . . . . . . . 163
Network problems . . . . . . . . . . . . 165
Observable problems . . . . . . . . . . . 165
Optional-device problems . . . . . . . . . 168
Power on and power off problems . . . . . . 169
Processor problems . . . . . . . . . . . 171
Serial-device problems . . . . . . . . . . 171
Software problems . . . . . . . . . . . . 172
Appendix A. Hardware
disassembling for recycle . . . . . . . 173
Disassemble the system board for recycle . . . . 173
Disassemble the processor and memory
expansion tray for recycle . . . . . . . . . . . 174
Disassemble the server for chassis recycle . . . . 175
Appendix B. Getting help and
technical assistance . . . . . . . . . . 177
Before you call . . . . . . . . . . . . . . . 177
Collecting service data . . . . . . . . . . . . 178
Contacting Support . . . . . . . . . . . . . 179
Appendix C. Notices. . . . . . . . . . 181
Trademarks . . . . . . . . . . . . . . . . 182
Important notes . . . . . . . . . . . . . . . 182
Telecommunication regulatory statement . . . . . 182
Electronic emission notices . . . . . . . . . . 183
Taiwan Region BSMI RoHS declaration. . . . 183
Taiwan Region import and export contact
information . . . . . . . . . . . . . . . . 184
Index . . . . . . . . . . . . . . . . . . 185