https://devzone.nordicsemi.com/f/nordic-q-a/58673/nrf52840-dk-onboard-debugger-issueHi everyone, I have an nRF52840 DK. So far, I have been programming the nRF DK using the UBS connector J2 and everything worked great. Since yesterday, by following the exact same procedure, for some reason the nRF52840 DK is not recognized by theen-USTelligent Community 13Fri, 06 Mar 2020 09:29:20 GMThttps://devzone.nordicsemi.com/thread/238456?ContentTypeID=1Fri, 06 Mar 2020 09:29:20 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fb91424c-021e-4ddd-a66a-fc4a6bee7123masterLee<p>Thank you Amanda, it works!</p> <p>Somehow the J-LINK interface MCU firmware was corrupted so I followed the steps in the guide. </p> <p>Thank you!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/238259?ContentTypeID=1Thu, 05 Mar 2020 11:53:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:16dfa435-6d0e-4d88-a6e1-a33e0ee279c8Amanda Hsieh<p>Hi,&nbsp;</p> <p>Please&nbsp;<span>check the DK with&nbsp;</span>this<span>&nbsp;</span><a href="https://devzone.nordicsemi.com/f/nordic-q-a/24592/my-nrf52-nrf51-dk-kit-doesn-t-work">post</a>.</p> <p>-Amanda H.&nbsp;</p><div style="clear:both;"></div>