Introduction
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            pry up the 2 side points to release the joints 
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            Using a flat opening tool, unclip the keyboard along the perimeter 
 
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            carefully clean the old Arctic cooling paste on the processor and heatsink 
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            before reassembling put some new Arctic paste 
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            To replace or remove HDD, unhook the 2 ribbon cables (purple arrow). Remove 2 screws (yellow arrow) 
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.