If your Surface Duo won’t start, try the following steps to get it working again.
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Plug one end of the USB-C cable into a USB-C power adapter, and then plug the adapter into a power outlet on the wall.
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Plug the other end into the USB-C port on your Surface Duo and charge your device for 15 minutes.
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Press the Power button.
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If it doesn’t turn on while it’s still plugged in, press and hold the Power button for 30 seconds.
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If your Surface Duo still won’t start, charge it for 1 hour, then press the Power button to turn it on.
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If that doesn’t work and you have a different USB-C cable and USB power adapter, plug the USB-C cable into your Surface Duo and plug the power adapter into the wall outlet, then charge your device for 1 hour.
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Press and hold the Power button for 30 seconds.