https://devzone.nordicsemi.com/f/nordic-q-a/3968/problem-with-s120-on-nrf51822Hi, I&#39;ve tried to implement s120 softdevice (version 1.0.0 production ready) on NRF51822 Development Kit and run ble_app_multilink_central example from sdk 6.1.0 on it but there is a problem. Example doesn&#39;t work and during debug i discovered that problemen-USTelligent Community 13Fri, 03 Oct 2014 14:01:14 GMThttps://devzone.nordicsemi.com/thread/14278?ContentTypeID=1Fri, 03 Oct 2014 14:01:14 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a798fd72-f47e-4ad3-bc9c-87c82bfe4261Martin<p>Hello Vidar. I checked your suggestions and they didn&#39;t helped but i downloaded fresh SDK once again and everything works fine so one way or another my problem was solved. Thanks for your answer.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/14277?ContentTypeID=1Thu, 02 Oct 2014 11:20:03 GMT137ad170-7792-4731-bb38-c0d22fbe4515:182fa33e-4509-46be-8399-6a504ea825f3Vidar Berg<p>Hi, Please make sure that you have placed the jumpers according the the image below. Otherwise the external LFCLK will not be connected to device, hence cause the hardfault. The other option is using the internal RC oscillator as the LF clock source. Just let me know if the problem persists.</p> <p><img src="https://devzone.nordicsemi.com/cfs-file/__key/communityserver-discussions-components-files/4/jumper.PNG" alt="image description" /></p><div style="clear:both;"></div>