Lenovo ThinkSystem SR645 Maintenance Manual page 202

Step 4. Remove the heat sink.
Figure 88. Heat sink removal
a. Use a Torx #T20 screwdriver to loosen all the captive screws in the removal sequence shown
on the heat-sink label. After loosening each captive screw, wait for several seconds for the
heat sink to loosen from the processor.
b. Slightly lift the heat sink away from the system.
After you finish
• If you are replacing a heat sink, install a new heat sink. See Install a standard heat sink.
• If you are replacing a processor, remove the processor. See Remove a processor.
ThinkSystem SR645 Maintenance Manual
192