Win10 laptop not recognizing nRF52840-DK

[danmr]

The JLINK driver is not working on my laptop although I see it; not sure why. When I plug in the USB a board LED flashes and I can change LEDs 1/2/3/4 with pushbuttons 1/2/3/4 but the laptop is not recognizing the board, it’s only supplying power to it. I've tried three Win10 laptops, two nRF52840-DKs, two usb cables. I've installed, uninstalled, rebooted, reinstalled the latest Segger J-link software versions. I installed nRFConnect and Segger debugger but they don't recognize the board either. I double checked the switch settings on the DK. I've also followed the miscellaneous advice found on the Nordic Dev Zone.

Any advice would be appreciated.

[Sigurd]

Hi,

Please go through the steps in this post: https://devzone.nordicsemi.com/f/nordic-q-a/24592/my-nrf52-nrf51-dk-kit-doesn-t-work

[danmr]

I went through all of the steps except measuring the supply voltage. Since I can see LED5 blinking and LED1/2/3/4 slowly blink and I can change them using Button1/2/3/4 it seems that the voltage is adequate. The two dev. boards are still not working.

[danmr]

To follow up, the problem is solved. I tried a THIRD USB cable and both dev. boards trigger the J-link driver. I've thrown the other two cables in the garbage.