https://devzone.nordicsemi.com/f/nordic-q-a/86192/nrf52840-mdbt50q-module-bricked-while-debugging---unable-to-recover-with-nrfjprogI&#39;ve just ran into this issue - I was debugging while developing using a J-Link on our own board. I tried setting up UART, set the pin config to In hindsight not the smartest choice to wildly try a pin number I think might work for the config, buten-USTelligent Community 13Fri, 25 Mar 2022 14:11:38 GMThttps://devzone.nordicsemi.com/thread/360047?ContentTypeID=1Fri, 25 Mar 2022 14:11:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:cfd1da3d-543c-4c4f-95e9-0c9feab82007pallens<p>Yeah, the J-Link works with other devices. I think the problem is now clear - we opted not to connect the reset line because we thought we didn&#39;t need it. Apparently, it is needed in this case. Due to the reset being on a pin on the underside of the module, I&#39;m not able to patch it. A thing for the next prototype revision, then.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/360042?ContentTypeID=1Fri, 25 Mar 2022 14:05:04 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c98bd6f8-2cef-45ad-b5de-c766a36d1f64Susheel Nuguru<p>Is your J-Link able to connect to any other devices? I sometimes goes to a problem where the debugger (not nRF chip) itself goes into weird state and I had to reflash its firmware.</p> <p>I sometimes have luck with the presumably bricked device using the J-Link Configurator which looks like below.</p> <p><img src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/communityserver-discussions-components-files/4/pastedimage1648216876744v1.png" alt=" " /></p> <p>Also check if your reset line is connected wrongly or with a wrong pull.</p><div style="clear:both;"></div>