https://devzone.nordicsemi.com/f/nordic-q-a/7331/no-response-from-master-on-nrf51-dongle-pca10031Like explained in this tutorial , on master control panel I do File-&gt; Flash Programming and reprogram the dongle, which then turns on one more LED on the dongle. But, I still get &quot;No response from master&quot; on MCP. I tried moving the dongle to another USBen-USTelligent Community 13Fri, 29 May 2015 18:15:18 GMThttps://devzone.nordicsemi.com/thread/25961?ContentTypeID=1Fri, 29 May 2015 18:15:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fdc5d115-3b93-4004-a60f-ca6e00fdf74bSarah<p>It suddently started working after restarting my computer. Thanks.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/25960?ContentTypeID=1Fri, 29 May 2015 03:06:22 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2eb9b34a-4ced-4551-858a-27d3645ec247Nguyen Hoan Hoang<p>try version 3.9</p><div style="clear:both;"></div>