https://devzone.nordicsemi.com/f/nordic-q-a/123874/mpsl-assert-112-1605Hello. I have developed a custom board with nrf52840. I am trying to get it running using a bluetooth hids peripheral example in nrf connect v3.1.0. And the main() runs just fine, but immediately after, it goes to sleep and an interrupt is called foren-USTelligent Community 13Sat, 23 Aug 2025 22:27:26 GMThttps://devzone.nordicsemi.com/thread/546535?ContentTypeID=1Sat, 23 Aug 2025 22:27:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d1d4b3a5-1cb0-498e-a5cd-a1acf7191147deiwo<p>Thank you for the reply. It helped me fix the issue. I had to resolder the chip and it works now.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/546461?ContentTypeID=1Fri, 22 Aug 2025 12:24:58 GMT137ad170-7792-4731-bb38-c0d22fbe4515:98fcc8df-41a4-4f65-ab67-18c2bdc7d90eEinar Thorsrud<p>Hi,</p> <p>The assert indicate that the HFXO was not started on time (or at all). Normally, the CPU runs of the HFINT, but the HFXO must be started to use the radio. The first thing is to check the HFXO cuircuirtry on your device (the HFXO soldedred correctly, proper load capacitor configuration, and that the crystal is within spec). A quite common mistake is to mount the crystal 90 degrees wrong.</p><div style="clear:both;"></div>