https://devzone.nordicsemi.com/f/nordic-q-a/69377/system-resetting-after-removing-usb-cableHello! We have a custom board connected to a battery and a USB cable Our fw calls: NRF_POWER -&gt; SYSTEMOFF = 1 ; The board turns off. And then we remove the USB cable, and the board turns back on again. We don&#39;t have any event handler seten-USTelligent Community 13Thu, 17 Dec 2020 08:57:26 GMThttps://devzone.nordicsemi.com/thread/285535?ContentTypeID=1Thu, 17 Dec 2020 08:57:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2e09646d-4b17-474a-abe3-fd6bfc9abad1ovrebekk<p>Sounds good, the best of luck <span class="emoticon" data-url="https://devzone.nordicsemi.com/cfs-file/__key/system/emoji/1f642.svg" title="Slight smile">&#x1f642;</span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/285415?ContentTypeID=1Wed, 16 Dec 2020 15:51:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a7318f8c-55cb-4db4-99e8-0d15315cfe1bJose Cazarin<p>Not yet, I&#39;ll get back to you if I find something</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/285237?ContentTypeID=1Wed, 16 Dec 2020 08:38:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c4a0afbb-4f6f-4629-aee3-e7b2f4b2fdd4ovrebekk<p>Hi Jose</p> <p>Did you figure this out?</p> <p>Did you try Olaf&#39;s suggestion?</p> <p>Best regards<br />Torbjørn</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/284439?ContentTypeID=1Fri, 11 Dec 2020 06:14:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ec7521c7-00d1-4b66-ad66-55808eaf19c9Olaf<p>Hi,</p> <p>maybe you could start debugging with reading the reset reason when the device starts up.</p> <p>In the solution of post <a href="https://devzone.nordicsemi.com/f/nordic-q-a/38405/detect-wake-up-reason-from-deep-sleep/148200#148200">https://devzone.nordicsemi.com/f/nordic-q-a/38405/detect-wake-up-reason-from-deep-sleep/148200#148200</a> you can find an example of how to log it and reset the reason value.</p><div style="clear:both;"></div>