https://devzone.nordicsemi.com/f/nordic-q-a/118889/not-able-to-flash-nrf52840-dk-unless-the-reset-pin-tied-to-nrf_vddI&#39;m going through the Academy courses and somewhere around Lesson 3, I could no longer flash firmware to the nrf52840 DK. I browsed the forum and found some notes around erasing the UICR (nrfjprog --eraseuicr / nrfjprog --recover) that run successfullyen-USTelligent Community 13Wed, 12 Feb 2025 19:27:31 GMThttps://devzone.nordicsemi.com/thread/522739?ContentTypeID=1Wed, 12 Feb 2025 19:27:31 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ce815121-c40d-4164-9903-f383efff051dZebbleMan<p>Did some additional digging...</p> <p>I had the power profiler 2 connected to the nrf52840-dk in ampere/current mode.&nbsp; I&#39;ve removed that and jumpered P22 and now everything is working as expected!</p> <p>I know I had installed a few firmwares in this config and everything worked.&nbsp; Not sure why it decided to stop working.</p> <p>I see one note that references this in the PP2 docs:</p> <p>&quot;To reprogram the<span>&nbsp;</span><span class="keyword">nRF52840</span><span>&nbsp;</span>SoC while the DK is prepared for current measurements, remove measurement devices from<span>&nbsp;</span><span class="keyword pcb">P22</span>, and then connect the USB cable.&quot;</p> <p>So I guess this is normal and what I initially saw was a fluke?</p> <p>Anyway, back to the academy courses.</p><div style="clear:both;"></div>