Introduction
This repair guide will help you replace the on/off button for the microphone on your Harmon Kardon Invoke. By replacing the microphone on/off button, this may resolve Cortana not responding when spoken to and ensure that the microphone is enabled at the appropriate time. For this repair, make sure you have a steady hand to prevent harming the internal hardware. While replacing the base screws, be sure to not strip them, otherwise, any future repair will be difficult.
Tools
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Use a Torx #10 screwdriver to remove three 10.0 mm screws from the highlighted board attached to microphone button.
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Conclusion
To reassemble your device, follow these instructions in reverse order.