Introduction
This is a very simple replacement that acts as a prerequisite for hard drive replacement. It involves just the use of a Phillips #0 screwdriver and small plastic opening tool.
Tools
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Locate the three 3 mm Phillips #0 screws on the back panel.
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Remove each screw using a small Phillips #0 screwdriver.
 
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Using a small plastic opening tool, pry off the back casing starting at a point closest to you and working around the perimeter of the case.
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.