Introduction
If your Motorola Moto 360 3rd Gen smartwatch multi-action button is not responding, you can use this guide to replace it. Check for dust build up before attempting this repair. Likewise, make sure to power off your smartwatch completely and disconnect from any external power source.
Tools
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Use a T4 Torx screwdriver to remove the four 4.2 mm screws securing the lower case.
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Gently pry the case open with a halberd spudger if the case will not release after removing the bolts.
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Raise the cover without straining the connected ribbon cable.
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Disconnect the ribbon cable from the motherboard with a halberd spudger.
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While pushing the Multi-Action Button inwards, use tweezers to remove the c-clamp holding the button in place.
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Remove the Multi-Action Button.
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Insert the new Multi-Action Button in place of the older Multi-Action Button.
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Attach the c-clamp back around the Multi-Action Button while it is being pushed inwards.
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To reassemble your device, follow these instructions in reverse order.