Not able to flash nRF5340 PDK anymore

[sethu]

Hey guys, 

All of a sudden, I'm not able to flash my nRF board anymore. I get the following message when I try to connect to the board using segger IDE.

And when I try west flash, I get the following:

As per that message, when I try "west flash --log", I get unknow command error.

Any help would be appreciated. 

Other info:

I'm pretty sure that it isn't a problem with the code I'm trying to flash or even anything on the PC because I have another one of the same board which works without any problem.

[StefanHri]

I have the same issue. However, updating nrfjprog to version v10.12.1 did not help. I am using Ubuntu 20.04.

[Amanda Hsieh]

Hi, 

Please create a new support case with the recovery logs for the app and net core.

-Amanda H. 

[sethu]

Hey, 

It could have been because you have accidentally erased the JLink chip on your DK, it happened to me on a different board recently as well, it happens when u power cycle with the reset pin pressed. All you need to do is press the reset button and try turning on the DK again, the light on the DK will blink and the DK will be shown as a bootable device on ur PC, if that works out you just have to download the binary of the firmware (link) used by the interface chip and drag and drop it onto the bootable device, after that power cycle the DK and everything should be back to normal. Please do refer to this answer (link)  by @Bjørn Kvaale for reference.

Cheers

(I don't have nrf5340 accessible anymore so couldn't check again with the same device)