Introduction
Follow these steps to replace the motherboard. The prerequisites are required to unsolder the items attached to it. You can simply unclip other items yourself, though.
Tools
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            Place the flat end of a nylon spudger in the gap between the cover and the rest of the device. 
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            Slide the spudger down each side until you hear numerous clicks. 
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            Remove the back panel from the tablet. 
 
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            Desolder the battery carefully from the motherboard. 
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            For help with soldering, visit iFixit's How to Solder and Desolder Connections guide. 
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.