nRF52 DK PC connection issues - No JLINK and BOOTLOADER disappears

nRF52 DK PC connection issues - No JLINK and BOOTLOADER disappearshttps://devzone.nordicsemi.com/f/nordic-q-a/69916/nrf52-dk-pc-connection-issues---no-jlink-and-bootloader-disappearsHello, I have a problem I have been unable to solve for more than a week. I have searched as best I know how to no avail. Windows 10, Segger Studio, Mbed studio, nRF Connect, JLink apps I have four identical nRF52 DK eval boards purchased in the lasten-USTelligent Community 13Mon, 28 Dec 2020 13:12:46 GMTRE: nRF52 DK PC connection issues - No JLINK and BOOTLOADER disappearshttps://devzone.nordicsemi.com/thread/286700?ContentTypeID=1Mon, 28 Dec 2020 13:12:46 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9680b52a-a799-4824-859a-b25b2082b69bAmanda Hsieh<p>Hi, </p> <p><span>You can download the Interface MCU firmware </span><a href="https://www.nordicsemi.com/Software-and-tools/Development-Kits/nRF52-DK/Download#infotabs">here</a><span>, and update it as described </span><a href="https://devzone.nordicsemi.com/f/nordic-q-a/24592/my-nrf52-nrf51-dk-kit-doesn-t-work/96836#96836">here</a><span>.</span></p> <p><span>Notice that we are entering the Christmas and New Year holidays and will have reduced staff, please expect delayed responses until after January 4th. Sorry for the inconvenience.</span></p> <p><span>-Amanda H.</span></p><div style="clear:both;"></div>