https://devzone.nordicsemi.com/f/nordic-q-a/78924/nrf52840-dk-is-brickedMy PC does not recognize the DK when I pluged it. I did try with different cables and also on differente PCs, but no USB device appears, and allways the LED1 light of NRF52840 flashing. I have hold IF BOOT/RESET button while powering on the board, buten-USTelligent Community 13Wed, 25 Aug 2021 13:45:12 GMThttps://devzone.nordicsemi.com/thread/326584?ContentTypeID=1Wed, 25 Aug 2021 13:45:12 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6a685887-a81e-4d6a-a1bf-48d8117ee415Simonr<p>Please go through our <a href="https://devzone.nordicsemi.com/f/nordic-q-a/24592/my-nrf52-nrf51-dk-kit-doesn-t-work">DK troubleshooting guide</a> to see if that helps your DK get back on track. Make sure that all the switches are in the correct places and that if the current measurement solder bridge is cut (SB40), make sure that pin header P22 is shorted with a jumper cable.</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>