My nrf52840 DK have problem!

Question

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 · Accepted Answer

I don't know extraclly reason! But If anyone has problem as me can : 
 
 put your PDK into boot mode ( press IFBOOT button while power cycle ) . 
 open "My computer" . Have BOOT folder. 
 copy and paste J-Link OB-SAM3U128-V2-NordicSemi 170213.bin to BOOT folder. 
 unplug and flug your usb capble into power .
:)

My nrf52840 DK have problem!

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