My nrf52840 DK have problem!

[MainOFF]

I have a nrf5280 PDK. I worked well. But now, when i plug micro usb capble from my computer. Led5 do not light or blink. and I can't load my program to nrf52840. How can I repair it?

[MainOFF]

I don't know extraclly reason! But If anyone has problem as me can :

1. put your PDK into boot mode ( press IFBOOT button while power cycle ) .
2. open "My computer" . Have BOOT folder.
3. copy and paste J-Link OB-SAM3U128-V2-NordicSemi 170213.bin to BOOT folder.
4. unplug and flug your usb capble into power . :)

[MartinBL]

Ok, hard to say what was wrong then, but thanks for sharing.