nRF54LM20-DK no LED power

RE: nRF54LM20-DK no LED power

meemoo — Tue, 10 Mar 2026 15:01:16 GMT

Nevermind, resolved. Google image searched, it is the Board Configurator within nRF Connect for Desktop.

RE: nRF54LM20-DK no LED power

meemoo — Mon, 09 Mar 2026 20:39:32 GMT

I was following along with the DevAcademy Connect SDK Fundamentals course with the blinky example and was completely stumped. My board is rev 0.3.4 as well. How do you reach this configuration ui to change VOUT1 and VOUT2? I have only been exposed to the official Connect SDK VS Code extensions so far. Thanks in advance.

RE: nRF54LM20-DK no LED power

nicell — Thu, 30 Oct 2025 07:03:54 GMT

This was exactly it! Thanks for the reply and explanation.

RE: nRF54LM20-DK no LED power

cheeric — Wed, 29 Oct 2025 20:21:40 GMT

I also ran into this issue with my nRF54LM20 DK rev 0.3.4.

I believe the reason the LEDs are not getting 5V power is because the nPM1300 default VDDIO (nPM VOUT1) and VDD_DRBG (nPM VOUT2) is configured to 3000mV by default out of the box:

Because nPM1300's VDDIO uses this VDD:nRF_PMIC voltage, the LED_PWR_CTRL (which is ~1.8V) from the debugger MCU is not able to assert HI and turn on the load switch output LSOUT2.

If I change the VDDIO (nPM VOUT1) and VDD_DRBG (nPM VOUT2) configuration to 1800mV or any value that satisfies , then the LSOUT2 turns on, P5V0:LED gets voltage, and LEDs turn on.

RE: nRF54LM20-DK no LED power

PaKa — Tue, 21 Oct 2025 12:59:03 GMT

Looking into this so don't do anything to the board in the meantime.

RE: nRF54LM20-DK no LED power

nicell — Mon, 20 Oct 2025 15:43:44 GMT

I don't think they worked the first time, but I don't remember for certain. The board configurator app is at 0.5.0, which is latest from what I can tell.

RE: nRF54LM20-DK no LED power

PaKa — Mon, 20 Oct 2025 09:21:46 GMT

Did the LEDs work when you plugged in the board the first time? Can you send a picture of the board so we can validate the jumper settings? You have updated to the latest board configurator app?