https://devzone.nordicsemi.com/f/nordic-q-a/61778/power-led-not-turning-on-nrf52840-dkHi, the power LED no longer turns on on my nRF52840 DK board. The board is still advertising when it is connected to a power source and I am able to connect to it with a mobile device. However, the J-LINK device does not show up on my computer any moreen-USTelligent Community 13Tue, 26 May 2020 10:06:34 GMThttps://devzone.nordicsemi.com/thread/251671?ContentTypeID=1Tue, 26 May 2020 10:06:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9d178611-8df5-412b-a905-aa327cb89b53Einar Thorsrud<p>Hi,</p> <p>From time to time we see issues with the Interface MCU firmware gets corrupted and needs to be reprogrammed. Can you try to do that? You can download the&nbsp;Interface MCU firmware <a href="https://www.nordicsemi.com/Software-and-tools/Development-Kits/nRF52840-DK/Download#infotabs">here</a>, and update it as described <a href="https://devzone.nordicsemi.com/f/nordic-q-a/24592/my-nrf52-nrf51-dk-kit-doesn-t-work/96836#96836">here</a>.</p><div style="clear:both;"></div>