Onboard debugger of nRF54L15DK not detected; using external J-Link shows ‘LOW VOLTAGE’ during flash

[Aadhil]

Hello all,

I’m working with the nRF54L15DK development kit and I’m facing a debugger / flashing issue.
Below are the details:

Setup / hardware used: nRF54L15DK

On-board debugger (SEGGER J-link or whatever onboard) is not being detected by the PC / development environment.

As a workaround I connected an external debugger (SEGGER J-Link) via the DEBUG IN header/pins.

The board is powered by with USB, during flashing via the external J-Link I get a message “LOW VOLTAGE” on the output screen. 

Any guidance or troubleshooting steps would be greatly appreciated. Thanks in advance!

[Håkon Alseth]

Hi,

 

Can you check if the jumper on "VDD CURRENT MEASUREMENT" is present?

Ie the header that is shown here: https://docs.nordicsemi.com/bundle/ug_nrf54l15_dk/page/UG/nRF54L15_DK/measurements/measure_ampmeter.html

  

Kind regards,

Håkon

[Aadhil]

Yes, it is present

[Håkon Alseth]

Hi,

 

Q1: Have you tested several usb cables, and different PCs?

Q2: Could you share a picture of the device setup?

Q3: Has this DK ever worked?

 

Kind regards,

Håkon