Introduction
If one of your buttons is not working and needs to be replaced this guide will give you step-by-step instructions.
Tools
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            Remove the white sticker covering the screws (if applicable). 
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            Use the PH1 screwdriver to remove the four 2 mm screws from the the backside of the device. 
 
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            Insert the plastic opening tool along the seam of the back case. 
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            Gently slide the plastic opening tool along the entire seam popping the clips free. 
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.