GPU replacement . . . . . . . . . . . . . . 133
Remove a GPU adapter . . . . . . . . . . 133
Install a GPU adapter . . . . . . . . . . . 134
Backplane replacement. . . . . . . . . . . . 134
Remove the backplane for four 3.5-inch hot-
swap drives . . . . . . . . . . . . . . 134
Install the backplane for four 3.5-inch hot-
swap drives . . . . . . . . . . . . . . 135
Remove the backplane for eight 2.5-inch hot-
swap drives . . . . . . . . . . . . . . 136
Install the backplane for eight 2.5-inch hot-
swap drives . . . . . . . . . . . . . . 137
Remove the backplane for ten 2.5-inch hot-
swap drives . . . . . . . . . . . . . . 138
Install the backplane for ten 2.5-inch hot-
swap drives . . . . . . . . . . . . . . 139
Remove the rear backplane . . . . . . . . 140
Install the rear backplane . . . . . . . . . 142
CMOS battery replacement . . . . . . . . . . 144
Remove the CMOS battery . . . . . . . . 144
Install the CMOS battery . . . . . . . . . 146
TPM adapter replacement. . . . . . . . . . . 148
Remove the TPM adapter . . . . . . . . . 148
Install the TPM adapter . . . . . . . . . . 149
Rear hot-swap drive cage replacement . . . . . 150
Remove the rear hot-swap drive cage . . . . 150
Install the rear hot-swap drive cage . . . . . 151
Middle drive cage replacement . . . . . . . . . 155
Remove the middle drive cage . . . . . . . 155
Install the middle drive cage . . . . . . . . 158
M.2 adapter and M.2 drive replacement . . . . . 161
Remove the M.2 adapter and M.2 drive. . . . 161
Adjust the retainer on the M.2 adapter . . . . 164
Install the M.2 adapter and M.2 drive. . . . . 165
RAID super capacitor module replacement . . . . 168
Remove a super capacitor module on the M.2/
riser support bracket . . . . . . . . . . . 168
Install a super capacitor module on the M.2/
riser support bracket . . . . . . . . . . . 169
Remove the RAID super capacitor module on
the chassis . . . . . . . . . . . . . . . 170
Install the RAID super capacitor module on
the chassis . . . . . . . . . . . . . . . 171
Front I/O assembly replacement . . . . . . . . 174
Remove the front I/O assembly . . . . . . . 174
Install the front I/O assembly . . . . . . . . 175
Hot-swap power supply replacement . . . . . . 175
Remove a hot-swap power supply. . . . . . 176
Install a hot-swap power supply . . . . . . 180
Heat sink and microprocessor replacement . . . . 185
Remove a heat sink . . . . . . . . . . . 185
Remove a processor . . . . . . . . . . . 187
Install a processor . . . . . . . . . . . . 187
Install a heat sink . . . . . . . . . . . . 188
Fan board replacement . . . . . . . . . . . . 190
Remove the fan board . . . . . . . . . . 190
Install the fan board . . . . . . . . . . . 191
Power inverter board (PIB) replacement . . . . . 192
Remove the PIB board . . . . . . . . . . 192
Install the PIB board . . . . . . . . . . . 193
System board replacement (trained technician
only) . . . . . . . . . . . . . . . . . . . 193
Remove the system board . . . . . . . . . 194
Install the system board . . . . . . . . . . 196
Update the Vital Product Data (VPD) . . . . . 197
Enable TPM . . . . . . . . . . . . . . 199
Enable UEFI Secure Boot . . . . . . . . . 200
Complete the parts replacement . . . . . . . . 200
Chapter 4. Problem
determination . . . . . . . . . . . . . 203
Event logs . . . . . . . . . . . . . . . . . 203
Light path diagnostics . . . . . . . . . . . . 204
General problem determination procedures . . . . 204
Resolving suspected power problems . . . . 205
Resolving suspected Ethernet controller
problems . . . . . . . . . . . . . . . 205
Troubleshooting by symptom . . . . . . . . . 206
Power on and power off problems . . . . . . 206
Memory problems . . . . . . . . . . . . 208
Hard disk drive problems . . . . . . . . . 209
Monitor and video problems . . . . . . . . 211
Keyboard, mouse, or USB-device
problems . . . . . . . . . . . . . . . 212
Optional-device problems . . . . . . . . . 213
Serial-device problems . . . . . . . . . . 214
Intermittent problems. . . . . . . . . . . 215
Power problems . . . . . . . . . . . . . 216
Network problems . . . . . . . . . . . . 216
Observable problems. . . . . . . . . . . 217
Software problems. . . . . . . . . . . . 219
Appendix A. Hardware
disassembling for recycle . . . . . . . 221
Disassembling the system board for recycle. . . . 221
Appendix B. Getting help and
technical assistance . . . . . . . . . . 223
Before you call . . . . . . . . . . . . . . . 223
Collecting service data . . . . . . . . . . . . 224
Contacting Support . . . . . . . . . . . . . 224
Appendix C. Notices. . . . . . . . . . 225
Trademarks . . . . . . . . . . . . . . . . 226
ii ThinkSystem SR635 Maintenance Manual
