Lenovo ThinkStation 2551 Hardware Maintenance Manual page 157

3. Locate the system board and disconnect all cables connected to the system board. See "Locating
parts on the system board" on page 84.
4. Remove the heat sink and fan assembly with the fan duct. See "Replacing the heat sink and fan
assembly" on page 142.
Note: Do not let the thermal grease on the bottom of the heat sink and fan assembly get in contact
with anything.
5. Lift the small handle
Figure 87. Accessing the microprocessor
6. Lift the microprocessor straight up and out of the microprocessor socket.
Figure 88. Removing the microprocessor
Notes:
a. Your microprocessor and socket might look different from the one illustrated.
1 and open the retainer
.
Chapter 11 Replacing FRUs (for machine types: 3688, 3690, 3691, 3693, and 3695)
2 to access the microprocessor 3 .
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