https://devzone.nordicsemi.com/f/nordic-q-a/29739/pca10040-usb-connection-issueConnect USB to PC, no &quot;JLINK&quot; device. But connect USB to PC and press reset button at same. I can see &quot;BOOTLOADER&quot; device. How can I get my board to normal?en-USTelligent Community 13Wed, 24 Jan 2018 21:15:54 GMThttps://devzone.nordicsemi.com/thread/117967?ContentTypeID=1Wed, 24 Jan 2018 21:15:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f25133f5-1b68-4986-9b6b-595905f23d96gxf<p>Thank you so much. After putting &quot;J-Link OB-SAM3U128-V2-NordicSemi 170213.bin&quot; in to &quot;BOOTLOADER&quot; device and restart. everything is ok.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/117966?ContentTypeID=1Wed, 24 Jan 2018 20:25:20 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5b92242d-22e6-4603-8e7f-3c511cc2b0f4Sigurd<p>Hi,</p> <p>See this <a href="https://devzone.nordicsemi.com/question/164807/my-nrf52nrf51-dk-kit-doesnt-work/">post</a></p><div style="clear:both;"></div>