https://devzone.nordicsemi.com/f/nordic-q-a/72885/win10-laptop-not-recognizing-nrf52840-dkThe 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 iten-USTelligent Community 13Wed, 17 Mar 2021 15:54:18 GMThttps://devzone.nordicsemi.com/thread/300493?ContentTypeID=1Wed, 17 Mar 2021 15:54:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b3f1d29d-329d-4eaa-8fa5-4cd8458790c4danmr<p>To follow up, the problem is solved. I tried a THIRD USB cable and both dev. boards trigger the J-link driver. I&#39;ve thrown the other two cables in the garbage. <span class="emoticon" data-url="https://devzone.nordicsemi.com/cfs-file/__key/system/emoji/1f642.svg" title="Slight smile">&#x1f642;</span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/300487?ContentTypeID=1Wed, 17 Mar 2021 15:44:22 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e359e6bf-e28b-4c99-ba26-44707f27ff53danmr<p>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.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/300305?ContentTypeID=1Wed, 17 Mar 2021 08:22:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e541864b-246d-4459-9c6b-f47a355081e2Sigurd<p>Hi,</p> <p>Please go through the steps in this post:&nbsp;<a href="https://devzone.nordicsemi.com/f/nordic-q-a/24592/my-nrf52-nrf51-dk-kit-doesn-t-work">https://devzone.nordicsemi.com/f/nordic-q-a/24592/my-nrf52-nrf51-dk-kit-doesn-t-work</a></p><div style="clear:both;"></div>