My nrf52840 DK have problem!

RE: My nrf52840 DK have problem!

MartinBL — Mon, 21 Aug 2017 10:57:16 GMT

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

MainOFF — Mon, 21 Aug 2017 09:34:28 GMT

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

MartinBL — Mon, 21 Aug 2017 08:28:30 GMT

Happy to help. Do you mind telling us what was wrong?

MainOFF — Mon, 21 Aug 2017 08:14:55 GMT

thanks Martin Børs-Lind! I was repair my board after use your help! :) you are so kind!

MainOFF — Mon, 21 Aug 2017 07:28:25 GMT

I was test all your question! And when I press IF BOOT/RESET button while power cycling the kit. Led5 blink. but can't flash. "No-Jlink found"

MartinBL — Mon, 21 Aug 2017 07:08:42 GMT

Hi, just a few standard questions for you:

Does the device show up in Device Manager on your computer? Please try to connect and disconnect the kit a few times. It might show up with unexpected names.
Have you tried a different USB cable? Faulty cables are surprisingly often the issue.
Have you tried to press the IF BOOT/RESET button while power cycling the kit? It should then show up as a Removable Storage Device named "BOOTLOADER". Then you can drag-and-drop this file onto the storage device to reprogram the JLINK firmware.
Can you measure the supply voltage on the nRF Device?
Can you make sure that you are using the latest J-Link driver version? www.segger.com/.../jlink
Can you try this guide? devzone.nordicsemi.com/.../

MainOFF — Mon, 21 Aug 2017 06:58:07 GMT

when I flash my board by kiel C5 :"no J-Link found"

MainOFF — Mon, 21 Aug 2017 06:53:59 GMT

I was check my usb capble! Do not have problem!