Introduction
If you are having trouble with your Harmony Hub, the motherboard may need to be replaced. For this guide, all you need is a Phillips #0 screwdriver. There are many screws, so be sure to set them on a mat so none of them get lost.
Tools
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            Insert the metal opening tool in the slit by the sensor. 
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            Carefully separate the Harmony Hub cover from the base. 
 
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            Unscrew the 2.0 mm Phillips #0 at the bottom right of the motherboard. 
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            Unscrew the 4.0 mm Phillips #0 at the top left of the motherboard. 
 
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            Face the Harmony Hub base so the sensor is facing out. 
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            Insert the plastic opening tool behind the motherboard on the gold section, which is to the right of the sensor. 
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            Lift until you hear a click. 
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.