Einleitung
Replacing the speaker requires the use of a soldering kit. A guide to soldering is available on iFixit's website here.
Werkzeuge
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            Heat solder and apply to the wires where they attach to the motherboard. This will disconnect the wires from the motherboard. 
 
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            Take the speaker and wires that are attached out of the device and insert a new speaker by soldering the wires to the motherboard. 
 
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                            Abschluss
                          
                          To reassemble your device, snap back piece back on to device and secure both 2cm screws at the bottom.