Lenovo ThinkSystem SR850P Maintenance Manual page 4

Install the security bezel . . . . . . . . . . 117
System board replacement . . . . . . . . . . 118
Remove the system board . . . . . . . . . 118
Install the system board . . . . . . . . . . 121
Update the machine type and serial
number . . . . . . . . . . . . . . . . 123
Enable TPM/TCM . . . . . . . . . . . . 124
Enable UEFI Secure Boot . . . . . . . . . 128
TCM/TPM adapter replacement . . . . . . . . 129
Remove the TCM/TPM adapter (for Chinese
Mainland only) . . . . . . . . . . . . . 129
Install the TCM/TPM adapter (for Chinese
Mainland only) . . . . . . . . . . . . . 130
Top cover replacement . . . . . . . . . . . . 132
Remove the top cover . . . . . . . . . . 133
Install the top cover . . . . . . . . . . . 134
Complete the parts replacement . . . . . . . . 135
Chapter 4. Problem
determination . . . . . . . . . . . . . 137
Event logs . . . . . . . . . . . . . . . . . 137
Light path diagnostics . . . . . . . . . . . . 139
Power supply LEDs . . . . . . . . . . . 140
System-board LEDs . . . . . . . . . . . 142
General problem determination procedures . . . . 143
Resolving suspected power problems . . . . 143
Resolving suspected Ethernet controller
problems . . . . . . . . . . . . . . . 144
Troubleshooting by symptom . . . . . . . . . 145
Hard disk drive problems . . . . . . . . . 145
Fan problems . . . . . . . . . . . . . . 147
Intermittent problems . . . . . . . . . . . 147
Keyboard, mouse, KVM switch or USB-device
problems . . . . . . . . . . . . . . . 148
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Memory problems . . . . . . . . . . . . 149
Monitor and video problems . . . . . . . . 151
Network problems . . . . . . . . . . . . 153
Observable problems . . . . . . . . . . . 153
Optional-device problems . . . . . . . . . 155
Power on and power off problems . . . . . . 157
Processor problems . . . . . . . . . . . 158
Serial-device problems . . . . . . . . . . 159
Software problems . . . . . . . . . . . . 159
Appendix A. Hardware
disassembling for recycle . . . . . . . 161
Disassemble the system board for recycle . . . . 161
Disassemble the processor and memory
expansion tray for recycle . . . . . . . . . . . 162
Disassemble the server for chassis recycle . . . . 163
Appendix B. Getting help and
technical assistance . . . . . . . . . . 165
Before you call . . . . . . . . . . . . . . . 165
Collecting service data . . . . . . . . . . . . 166
Contacting Support . . . . . . . . . . . . . 167
Appendix C. Notices. . . . . . . . . . 169
Trademarks . . . . . . . . . . . . . . . . 170
Important notes . . . . . . . . . . . . . . . 170
Telecommunication regulatory statement . . . . . 170
Electronic emission notices . . . . . . . . . . 171
Taiwan BSMI RoHS declaration . . . . . . . 171
Taiwan import and export contact information . . . 172
Index . . . . . . . . . . . . . . . . . . 173