Serial port module replacement . . . . . . . . 145
Remove the serial port module . . . . . . . 145
Install the serial port module . . . . . . . . 147
System board replacement (trained technician
only) . . . . . . . . . . . . . . . . . . . 149
Remove the system board assembly . . . . . 149
Install the system board assembly . . . . . . 151
Update the machine type and serial
number . . . . . . . . . . . . . . . . 153
Enable UEFI Secure Boot . . . . . . . . . 155
Trayless drive and drive cage replacement (trained
technician only) . . . . . . . . . . . . . . . 155
Remove the drive cage and trayless drives . . 156
Install the drive cage and trayless drives . . . 160
Firmware and TPM 2.0 Security Module
replacement (trained technician only) . . . . . . 166
Remove the Firmware and TPM 2.0 Security
Module . . . . . . . . . . . . . . . . 166
Install the Firmware and TPM 2.0 Security
Module . . . . . . . . . . . . . . . . 167
Top cover replacement . . . . . . . . . . . . 168
Remove the top covers . . . . . . . . . . 168
Install the top covers . . . . . . . . . . . 170
Wall mount LED cable replacement (trained
technician only) . . . . . . . . . . . . . . . 172
Remove the wall mount LED cable. . . . . . 172
Install the wall mount LED cable . . . . . . 174
Complete the parts replacement . . . . . . . . 174
Hardware disassembling for chassis recycle . . . 175
Chapter 4. Problem
determination . . . . . . . . . . . . . 177
Event logs . . . . . . . . . . . . . . . . . 177
The front operator panel and error LEDs . . . . . 179
System-board LEDs . . . . . . . . . . . 180
General problem determination procedures . . . . 180
Resolving suspected power problems . . . . 181
Resolving suspected Ethernet controller
problems . . . . . . . . . . . . . . . 181
Troubleshooting by symptom . . . . . . . . . 182
Power on and power off problems . . . . . . 182
Memory problems . . . . . . . . . . . . 184
Monitor and video problems . . . . . . . . 188
Keyboard, mouse, KVM switch or USB-device
problems . . . . . . . . . . . . . . . 189
Optional-device problems . . . . . . . . . 190
Serial-device problems . . . . . . . . . . 192
Intermittent problems. . . . . . . . . . . 192
Power problems . . . . . . . . . . . . . 193
Network problems . . . . . . . . . . . . 194
Observable problems. . . . . . . . . . . 195
Software problems . . . . . . . . . . . . 197
Appendix A. Getting help and
technical assistance . . . . . . . . . . 199
Before you call . . . . . . . . . . . . . . . 199
Collecting service data . . . . . . . . . . . . 200
Contacting Support . . . . . . . . . . . . . 201
Appendix B. Notices . . . . . . . . . . 203
Trademarks . . . . . . . . . . . . . . . . 204
Important notes . . . . . . . . . . . . . . . 204
Telecommunication regulatory statement . . . . . 204
Electronic emission notices . . . . . . . . . . 205
Taiwan BSMI RoHS declaration . . . . . . . 205
Taiwan import and export contact information . . . 205
Index . . . . . . . . . . . . . . . . . . 207
ii
ThinkEdge SE450 Maintenance Manual
Summary of Contents for 7D8T
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