Introduction
For any major replacement, you need to disassemble the router to get full access to the motherboard
Tools
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Use a blue plastic opening tool to remove the top cover.
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Move the blue plastic opening tool gently underneath the top cover from side to side.
 
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Gently lift the motherboard and remove it from the case
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Put the motherboard over a (preferably white) surface.
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.