https://devzone.nordicsemi.com/f/nordic-q-a/90289/nrf52811-doesn-t-start-up-with-external-32k-oscillator-enabled-zephyr-with-nrf-sdk-1-9-0Hi, I have a board using an off the shelf nrf52811 module (from raytac). The only things on the board are the recommended 32k crystal with 2x 12pF caps, as well as two decoupling caps and the two inductors for the DCDC converter. I have a simple en-USTelligent Community 13Sat, 23 Jul 2022 10:07:01 GMThttps://devzone.nordicsemi.com/thread/378408?ContentTypeID=1Sat, 23 Jul 2022 10:07:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3455f87d-a319-42cf-a6b3-5b0569e111e9jeremyherbert<p>I ended up resolving this problem. There was an issue with some residue from the board wash process causing too high of a load capacitance on the crystal. Once this was cleaned, it started working.</p><div style="clear:both;"></div>