https://devzone.nordicsemi.com/f/nordic-q-a/57626/nrf5340-pdk-potentially-deadTo start, this was a functional unit and I had been installing test firmware into it. As of a couple of days ago while attempting to read and write to my nrf5340-PDK module, I am receiving the following : 2020-02-10T13:11:21.483Z INFO Applicationen-USTelligent Community 13Tue, 11 Feb 2020 16:09:56 GMThttps://devzone.nordicsemi.com/thread/233816?ContentTypeID=1Tue, 11 Feb 2020 16:09:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:51fa88e8-cf19-4375-bd37-95ddf39936a5AMarch<p>This is great! Your recovery operation did the trick. The board appears to be online.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/233755?ContentTypeID=1Tue, 11 Feb 2020 13:23:30 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5e5f6a71-17c4-4078-81f7-34012adb430bAmanda Hsieh<p>Hi, </p> <p></p> <p>Please make sure that you do not have more than one program that tries to talk to the PDK through the same port.&nbsp;</p> <p>If you are trying to access the PDK on the same port at the same time you could get this error.</p> <p></p> <p>Please open the command line and run &#39;nrfjprog --eraseall&#39;</p> <p>you could also try &#39;nrfjprog --recover&#39;</p> <p><a href="https://infocenter.nordicsemi.com/index.jsp?topic=%2Fug_nrf5x_cltools%2FUG%2Fcltools%2Fnrf5x_nrfjprogexe_reference.html&amp;resultof=%22%6e%72%66%6a%70%72%6f%67%22%20" rel="noopener noreferrer" target="_blank">doc</a></p> <p></p> <p>Please post any logs or errors from the testing.</p> <p></p> <p>-Amanda H.</p><div style="clear:both;"></div>