https://devzone.nordicsemi.com/f/nordic-q-a/128003/unable-to-flash-custom-board-using-devkit-both-nrf52840Hi all, I am using a tagconnect cable to flash my custom boards using a devkit. I was able to flash 4/5 boards. I first recovered the locked factory boards, and then flashed them. Unfortunately the last board keeps giving me this error: I am doingen-USTelligent Community 13Mon, 04 May 2026 11:21:20 GMThttps://devzone.nordicsemi.com/thread/565822?ContentTypeID=1Mon, 04 May 2026 11:21:20 GMT137ad170-7792-4731-bb38-c0d22fbe4515:94462751-f697-4bd2-8832-18b237f1ef4aHung Bui<p>Hi Vic,&nbsp;<br />Could you explain a little bit on &quot;<span>&nbsp;I first recovered the locked factory boards&quot;&nbsp; ? What did you mean by &quot;locked factory boards&quot; ?&nbsp;<br />As David already suggested, please double check if the chip has been powered properly and the SWD lines are connected properly.<br /></span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/565791?ContentTypeID=1Sun, 03 May 2026 14:26:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c45b3a95-f2cf-4a2c-a89c-6d20c1fc0d27Dave Littell<p>Hi Vic0,</p> <p>I once had a similar problem with an nRF52840-based board. &nbsp;Ultimately the problem was the nRF52840 wasn&#39;t being powered properly. &nbsp;Just a thought... &nbsp;Good luck!</p><div style="clear:both;"></div>