Refurbish Laptop-Step 2

Lift up the CPU and install it back into the socket on the motherboard. Now you can safely remove old thermal paste and apply a new layer of paste.

This is also how boosting the laptop speed by replace the CPU

Summary
 

Removing and Installing CPU

The CPU is locked in the socket. Before you can remove the CPU, you'll have to unlock the socket. Use a flathead screwdriver and turn the socket screw to "Open" position.

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There is only one correct way to install the processor into the socket. Both CPU and socket are keyed. When you are installing the CPU, make sure to match pins on the processor with holes on the socket.

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Before applying thermal grease on the CPU, clean the surface with alcohol.

Spread thermal grease evenly and install the heat sink.

 ATTENTION! If you forget to lock the CPU in the socket, the laptop will not boot. If you install the heat sink without applying thermal grease, the CPU will overheat.