nRF52840DK - problems getting started

[Alex_S@Aperia]

Purchased nRF52840 DK. 
Plugged it with USB cable to my Win11 PC
Trying to follow instructions in the enclosed brochure, which points to nordicsemi.com/start52840dk
Step 4 - Flip the power switch to "on"


The switch highlighted in the picture is marked VEXT->nRF, power switch is to the left of it.
So, I flip the actual power switch. The power source switch is set to VDD.
LED 1 starts blinking very slowly, LED 5 is blinking very fast
I don't see any pop-ups or any other indication that PC recognizes the board, no COM port get created.
I have SEGGER J-Link V7.96f for Windows installed.
J-Link commander fails to find the DK
Is there any additional software I need to install ? 

[Alex_S@Aperia]

Additional info - I installed nRFConnect Desktop v4.4.1 for Windows and some apps, including Programmer (v4.3.0)
When I launch Programmer, Select Device menu shows "No supported devices connected"

Programmer used to complain about J-Link version being not what expected (v7.96F vs v7.94E), I installed v7.94E, the warning message is gone, but still "No supported devices connected".

[Alex_S@Aperia]

Quick Start  app doesn't find the board either. It says "contact support on DevZone and provide the log", here it is

.

Fullscreen 2024-05-02T02_22_27.538Z-log.txt Download

2024-05-02T02:22:27.754Z INFO Initialising nrfutil module: device
2024-05-02T02:22:27.763Z DEBUG Started watching devices
2024-05-02T02:22:29.462Z INFO Using nrfutil-device core version: 7.7.1
2024-05-02T02:22:30.307Z INFO Using nrfutil-device version: 2.1.1
2024-05-02T02:22:30.308Z INFO Using nrf-device-lib version: 0.17.5
2024-05-02T02:22:30.308Z INFO Using nrfjprog DLL version: 10.24.0
2024-05-02T02:22:30.309Z INFO Using JLink version: JLink_V7.94e

[Alex_S@Aperia]

Found this  ld5 flashing quickly, board not visible, PCA10056 IF BOOT not work!
Looks very similar except that I do have nRF power source set to VDD...

[Alex_S@Aperia]

Also, this is very similar  nRF52840 power on led(Led 5) blinking continuously
I already tried 2 USB micro cables, perhaps these both are power only, I'll see if I can find some more

[Priyanka]

Hi Aleksander,

Please do try with other USB cables and let me know how it goes. 

Regards,

Priyanka