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Incorrect power LED signal

Hi all

My nRF51822 has a incorrect LED signal, seems become a battery mode when I plug in a USB port. The detail feature as below:

  1. Incorrect device type in Micorsoft device manager, seems be detect as a Camera:
  2. Incorrect LED light, LED 3 (power signal) should be lighted when I plug with USB port, but not.
  3. Cannot list in SDK and Master control.

any idea? thanks.

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