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nRF52840-DK Not detected by the computer.

Hello, 

I have an issue since today. Indeed I worked for a few weeks on the nRF52840 and everything was alright. I used a dock to connect the nRF52840 by serial port with micro usb. Now I am working at home and I do not have the dock but I do work on the same computer. The issue is that the nRF52840 is not even detected. I tried : 

- Reinstalling jlink drivers

- Using different cables

- Using another nRF52840 DK

 

Nothing has worked for me my computer does not see the DK. I cannot connect jlink I have this error "Connecting to J-Link via USB...FAILED: Cannot connect to J-Link.".

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