nRF52840-DK not detected

[xhr0428]

I just bought a new nRF52840-DK. But it cannot be detected when connecting to the computer. In nRF Connect Programmer, it shows "Unsupported device. The detected device could not be recognized as neither JLink device nor Nordic USB device. "

I tried nrfjprog commands

nrfjprog —family nRF52 —eraseall returned

JLinkARM DLL reported an error

nrfjprog —family nRF52 —recover returned

Recover failed. Please make sure that the correct device family is given and try again

I also tried to follow the steps in the below thread, but after copying the file to JLink folder, only a FAIL text file appeared in the folder. The text file has this line inside "The currently active SWD interface does not support MSD drag and drop"

 nRF52840 dev board not detecting 

How should I get this to work? Thanks

[mksth]

Hi, I have simmilar issue. I have USB connected my nRF52840 with my Windows 10 computer. The "Led 5" blinks quite fast. The board can't be discovered by my machine. I see that device manager doesn't reload after plugging / unplagging the board. I have tried with 5 cables, so I think I can exclude cable issue. I have installed:

- nrfjprog version: 10.24.2 external
- JLinkARM.dll version: 7.96f

My board:

- PCA10056 
- version number 3.0.0   2022.36

Any thoughts?

Update: I just bought 6th cable. The board started work!