nRF52840 DK power on faild

[jones]

Hi

I have 3 nRF52840 DK, just shipped this week. And two could power on success.

But one failed to power on after connecting with same USB cable. The LDE5 did not light up and no COM PORT found with my Computer.

Other two board could work fine with demo application.

How to solve this problem.

Thanks

[MartinBL]

Hi, Can you please try/answer all of the suggestions in this thread?

[jones]

Hi Martin,

I found the problem. We adjust the switch to "nRF ONLY", after switch back to "DEFAULT"

The DK works normally

Thanks