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Step 6. Remove the 4 screws that secure the system fan to the motherboard.
Step 7. Remove the heat-sink by lifting it up.
Step 8. To install the new heat-sink:
a. Line up the new heat-sink with the mounting holes on the chassis and place it into position.
b. Secure the new heat-sink with the 4 screws.
Step 9. Reattach the system fan and computer cover.
Replacing the system fan
Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.
Note: It may be helpful to place the computer face-down on a soft at surface for this procedure. Lenovo
recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches
or other damage.
To replace the system fan:
Step 1. Remove any media (disks, CDs, or memory cards) from the drives, shut down the operating
system, and turn off the computer and all attached devices.
Step 2. Unplug all power cords from electrical outlets.
Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)
cables, and any other cables that are connected to the computer. Refer to “Left and right view”
and “Rear view” for help with locating the various connectors.
Step 4. Remove the computer cover. Refer to “Removing the computer cover”.
Chapter 8. Replacing hardware 33