https://devzone.nordicsemi.com/f/nordic-q-a/74278/nrf5340---cannot-detect-board-and-first-heartbeat-ledHello, I have recently received nrf5340 development kit. To get my very first stamps of programming given precompiled image peripheral heart rate, I 1. Connected board via micro USB and turned Power switch to ON position. 2. I can see LED5 besidesen-USTelligent Community 13Thu, 22 Apr 2021 13:05:02 GMThttps://devzone.nordicsemi.com/thread/306345?ContentTypeID=1Thu, 22 Apr 2021 13:05:02 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5d880456-c90a-4548-a99d-e1470d3042bfAmanda Hsieh<p>When&nbsp;DK get the power from the nRF5340 USB connector (J3).</p> <p>-Amanda H.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/306331?ContentTypeID=1Thu, 22 Apr 2021 12:35:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:637979e9-4428-453d-a6c4-064fd3354b98Maulik Patel<p>Yes, it worked. thank you very much. When should one select USB&nbsp; position?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/306310?ContentTypeID=1Thu, 22 Apr 2021 11:49:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7cb896ab-debb-458c-ba74-c69cab7caf81Amanda Hsieh<p>Hi Maulik,</p> [quote user=""] SW9 is USB power source position.[/quote] <p>The nRF power source switch (SW9) must be in the VDD position.</p> <p>Please let me know this helps the issue or not. Thanks.&nbsp;&nbsp;</p> <p>-Amanda H.&nbsp;</p><div style="clear:both;"></div>