possible nRF52840 DK BLE module failurehttps://devzone.nordicsemi.com/f/nordic-q-a/85399/possible-nrf52840-dk-ble-module-failureHi, I use two nRF52840 DK for testing purposes for over 1.5 years now. Suddenly, yesterday the BLE module in one of the DK&#39;s stopped working. Just like that. Same functional code, same everything. The program always freezes inside ble_stack_init() whenen-USTelligent Community 13Fri, 04 Mar 2022 11:56:26 GMTRE: possible nRF52840 DK BLE module failurehttps://devzone.nordicsemi.com/thread/356273?ContentTypeID=1Fri, 04 Mar 2022 11:56:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e97b381e-e2b0-4063-8f8c-00e6c922c542Amanda Hsieh<p>Hi,&nbsp;</p> <p><span>The HFXO crystal is required for the Softdevice. Maybe you could change the oscillator to test. See <a href="https://devzone.nordicsemi.com/f/nordic-q-a/75997/changing-the-oscillator/313656#313656">this post</a>.&nbsp;</span></p> <p><span>Regards,<br />Amanda</span></p><div style="clear:both;"></div>