Introduction
The motherboard has lots of other parts mounted into it, therefore it is important to treat the board carefully, and follow instructions as shown on the steps.
Tools
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            Unplug the charger and remove any memory card you may have in the device. 
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            Wedge the plastic opening tool between the front and back cover on every side. 
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            Slide the plastic opening tool back and forth to make sure that the back cover is disconnected. 
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            Once disconnected, remove the back cover from the device screen. 
 
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            Locate the battery cable attached to the motherboard. Using the same technique used on the ribbons, do the same with the battery. 
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            Remove the battery from the device. Once removed, use the plastic tool to separate the metal frame from the battery. 
 
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            Carefully disconnect the cord that connects the on/off button to the motherboard 
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            Peel back the electrical tape holding the connections of the motherboard down to the frame of the device. 
 
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To reassemble your device, follow these instructions in reverse order.