Introduction
If your fan starts getting louder and your laptop starts to overheat it could be that you need to replace your fan. It's a simple replacement and would only need two tools a #1 Philip screwdriver and prying tools.
Tools
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            Remove the eight 6 mm screws from the back panel using a Phillips #1 screwdriver. 
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            Remove the rubber pads from the upper corners of the laptop to reveal two screws on each side. 
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            Remove six 4 mm screws using a Phillips #1 screwdriver. 
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            Pry the back panel off using an opening tool, working your way around the edges. 
 
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            Remove the two 3 mm screws that secure the fan. 
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            Gently disconnect the power cable; it can tear easily. 
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            Remove the fan. 
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.