Programming nrf51-DK with another nrf51-DKhttps://devzone.nordicsemi.com/f/nordic-q-a/24466/programming-nrf51-dk-with-another-nrf51-dkI have two nrf51-DK&#39;s (say A and B). A , nrfStudio doesn&#39;t detects it. (Windows doesn&#39;t even shows USB port connection in device manager, so cannot try nrfjprog --recover) B is working fine. I was trying to reach A&#39;s flash usingen-USTelligent Community 13Fri, 18 Aug 2017 08:51:33 GMTRE: Programming nrf51-DK with another nrf51-DKhttps://devzone.nordicsemi.com/thread/96327?ContentTypeID=1Fri, 18 Aug 2017 08:51:33 GMT137ad170-7792-4731-bb38-c0d22fbe4515:06ad516e-36eb-4415-91fd-aa417ae6f1d1RohanKadam<p>After dropping the program in BOOTLOADER drive. LD5 started blinking very fast. On power cycling my board, everything started working properly.</p> <p>Thanks a lot.</p><div style="clear:both;"></div>RE: Programming nrf51-DK with another nrf51-DKhttps://devzone.nordicsemi.com/thread/96326?ContentTypeID=1Fri, 18 Aug 2017 08:35:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:af4e998d-5f11-4d49-bef9-e5d1ac9bc900J&#248;rgen Holmefjord<p>Have you tried putting the board into bootloader mode, by holding IF BOOT/RESET button while powering the board? If it shows up as a removable drive with name BOOTLOADER, try drag and drop program the <a href="http://www.nordicsemi.com/eng/nordic/Products/nRF52-DK/nRF5x-OB-JLink-IF/52275">J-Link OB interface firmware</a>.</p><div style="clear:both;"></div>