https://devzone.nordicsemi.com/f/nordic-q-a/87624/program-will-not-start-on-custom-board-without-debuggerGreetings. I am developing a application that will run on a custom board based on the nrf52833 MCU. During development we have been using a nrf52833 development kit for testing and the codebase is built on top of the nordic nrfconnect sdk (release 1.9en-USTelligent Community 13Fri, 06 May 2022 12:22:35 GMThttps://devzone.nordicsemi.com/thread/366718?ContentTypeID=1Fri, 06 May 2022 12:22:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:51cb7233-e2f0-4769-9974-eaf6107fdce7Jared<p>From <a href="https://devzone.nordicsemi.com/support-private/support/288634/we&#39;ve%20found%20that%20the%20module%20we%20were%20using%20did%20not%20possess%20a%2032khz%20crystal%20oscillator,%20switching%20the%20configuration%20to%20the%20RC%20oscillator%20solved%20the%20issue%20for%20us.">this </a>thread:</p> <p></p> <p><em>&nbsp;we&#39;ve found that the module we were using did not possess a 32khz crystal oscillator, switching the configuration to the RC oscillator solved the issue for us.</em></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/366693?ContentTypeID=1Fri, 06 May 2022 11:12:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:79b41ccc-04cd-4949-b287-f700e7f540c5Jared<p>Hi,</p> <p>Are you using external HFXO and LFXO crystals on your custom board?</p> <p>What voltage do you measure on the reset pin?</p> <p>Could you provide the output if you run this command with nRF Command line tools:</p> <p><pre class="ui-code" data-mode="text">nrfjprog --readregs</pre></p> <p>regards</p> <p>Jared</p><div style="clear:both;"></div>