Introduction
Make sure that you have a cooling fan with the same voltage/amperage settings to prevent abnormal operation.
Tools
Parts
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            Ground yourself by either touching an unpainted metal surface or by using the Anti-Static wrist strap. 
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            Turn off the computer and remove the charger from the charging port. 
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            Turn the laptop over and slide the battery release catch to the right. The battery will pop up from its slot. Remove it using your fingers. 
 
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            Use a Phillips #0 screwdriver to remove the four screws from the indicated cover. 
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            Gently lift and remove the cover. 
 
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            Pry the keyboard off with a spudger. Be careful not to apply too much pressure and damage any components. 
 
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            Disconnect the clip attaching the keyboard wiring to the motherboard. Lift and remove the keyboard. 
 
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            Use a Phillips #0 screwdriver to remove the 6mm screw from the top panel. 
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            Gently lift and remove the panel. Use a metal spudger if the it seems set in place. 
 
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            Use a Phillips #0 screwdriver to remove the 6mm screw for the Wi-Fi module cover. 
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            Remove the cover. 
 
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            Partially separate the two panels until connectors are visible. 
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            Unclip the wires that attach the trackpad module to the motherboard. 
 
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            Press a metal spudger between the VGA port and the plastic housing to pry up the motherboard. 
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            Remove the motherboard and turn it so that the fan is facing upward. 
 
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            Use a Phillips #0 screwdriver to loosen the three screws attaching the heatsink to the motherboard. 
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            Remove the heatsink and fan assembly by unclipping the fan from the motherboard. 
 
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To reassemble your device, follow these instructions in reverse order.