nRF52840 DK not powering on

RE: nRF52840 DK not powering on

JONATHAN LL — Wed, 18 Nov 2020 15:30:48 GMT

Hi Vishnu,

The behavior seems odd, when powering the device from J3 connector if the switch SW9 is in VDD position(center) then the LED's should not be faded in power, compared to when connecting and powering through J2 connector. If the SW9 is put in to USB then the lade is faded when powering over J3 connector.

The J3 connector can not be used to program/debug.

Do you have both SB34 and 39 shorted or only one of them ?
What additional hardware are you connecting to the DK's and how do you normally power them.

Regards,
Jonahtan

RE: nRF52840 DK not powering on

Vishnu Pradeep — Wed, 18 Nov 2020 06:27:11 GMT

Shorted the SB39 switch and got it working,
I've tried shorting SB34 switch first, but didn't work.
Any thoughts on the possible issues?

Will try with other non working DKs.

RE: nRF52840 DK not powering on

Vishnu Pradeep — Tue, 17 Nov 2020 12:25:37 GMT

Hi Jonathan,

From where can I get that?
I can see only 400236 0364RUBR on top side and SS-3 94V-0 1420 E229342 on the back.

Edit: Yeah on the cover it is written as 2.0.1 2020.20

Thanks,

Vishnu

RE: nRF52840 DK not powering on

JONATHAN LL — Tue, 17 Nov 2020 12:09:11 GMT

Hi Vishnu,

Can you provide me with the info on the boards that have failed.
Version number: example 1.1.0
Production date: example 2019.6

Regards,
Jonathan