Microsoft Wireless Mobile Mouse 4000 Teardown

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Separate PCB from bottom plastic guard

Remove 2 Screws from either side of the click wheel on the lower tier of the PCB.
Remove the 3 screws from the top tier of the PCB.
Do not separate the PCB from the plastic backing too fast. There is a separate small PCB screwed into the plastic backing which is connected to the main PCB with 2 wires.
Remove the screw holding the small PCB to the plastic backing

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