https://devzone.nordicsemi.com/f/nordic-q-a/49850/custom-board-without-optional-crytal-problemHello everyone, We are using the nrf52840 Dev Kit (PCA10056 1.1.0 2019.19 683465548) SDK version: 15.3 OS: Fedora We have our program working fine (RTT Logs OK and Led blinking OK ) on the nrf52840 DevKit but when we try on our custom boarden-USTelligent Community 13Wed, 17 Jul 2019 10:02:11 GMThttps://devzone.nordicsemi.com/thread/198913?ContentTypeID=1Wed, 17 Jul 2019 10:02:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:203b559a-c7c2-4a6c-89f4-adb5f574b122Louis Hatte<p>I just checkout on an old commit and all is working fine now...</p> <p>I think I&nbsp;never flashed the soft device code on my custom board and blinky project don&#39;t need it.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/198726?ContentTypeID=1Tue, 16 Jul 2019 13:02:20 GMT137ad170-7792-4731-bb38-c0d22fbe4515:06342328-dfa5-42d8-8226-12cf0f9393b0Stian R&#248;ed Hafskjold<p>Hi, you need to debug the code to see where it is failing. Run the debugger from whatever IDE you are using, and see which function call is returning with an error (or not returning at all).</p> <p>If you are using Segger embedded studio there is a how-to at the end here: <a href="https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/segger-embedded-studio-a-cross-platform-ide">https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/segger-embedded-studio-a-cross-platform-ide</a></p><div style="clear:both;"></div>