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  • Case ID: 338759
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NRF52840 DK Board not working

Rahul Chavda

I have an NRF52840 DK (3.0.2) board, but it is not working. The USB port is not detected. When I power it through USB, the debug LED (LED5) turns on and then off. On the SoC side,

LEDs 1, 2, 3, and 4 are dimly lit. Please help and provide a proper solution.

  • 0 in reply to Rahul Chavda

    I am facing the same issue. The LED5 on my DK board blinks for a short time and then turns off. Please find the attached video.

  • 0 in reply to Rahul Chavda

    Can you use the Debug out port from the other DK to program the nRF52840 on the DK that does not work as expected?



    You can use a 10-pin ribbon cable connector here and try to program the nRF52840, if there are no issues with that then its likely that there is something wrong with the debugger chip and circuitry.

    Regards,
    Jonathan

  • 0 in reply to JONATHAN LL

    ok dear 
    my board SOC is work but debugger is not working please help me . how to debugger on. 

  • 0 in reply to Rahul Chavda

    Thanks for the info, 

    Can you try and connect an extra USB cable to the nRF52 USB port? 

    Where the arrow indicates. So both USB connectors on the DK is connected to the computer. 

    Regards,
    Jonathan

  • 0 in reply to JONATHAN LL

    "We also tried this, but it did not work. Only the SoC is working."

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