Lenovo IdeaCentre Q700 - Manual (Page 38)

Hardware Maintenance Manual
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3. Pull the heat sink out from the CPU.
4. Place the heat sink upside down on a flat surface to prevent thermal
grease from contaminating other components.
Note
Wipe off the thermal grease from both the heat sink and CPU using
an alcohol pad.
5. Set the new heat sink on the CPU, aligning the four screws in the heat
sink with the screw sockets in the motherboard.
6. Install the computer cover. Refer to “Completing the installation”.