Turn Off Built-in LEDs on Raspberry Pi 4

Turn Off Built-in LEDs on Raspberry Pi 4

Raspberry Pi has few built-in LEDs such as PWR and ACT. It is a great device indicator but, blinking LEDs at night can be an annoyance. Also, LEDs consumes a little bit of power.

This tutorial explains how to turn off built-in LEDs on Raspberry Pi 4.

Raspberry Pi 4 Model B has integrated power LED (PWR), activity LED (ACT) and two Ethernet socket LEDs: link LED (LNK) and activity LED (ACT). The following table presents the purpose of each LED:

No.LEDColorDescription
1.PWRRedPower indicator. Is always on if enough power (> 4.65V).
2.ACTGreenMemory card status indicator. It blinks during memory card activity.
3.LNK (Ethernet)AmberEthernet link indicator. It is always on when Ethernet is connected.
4.ACT (Ethernet)GreenEthernet status indicator. It blinks during network activity.

Raspberry Pi has a configuration file /boot/config.txt which contains parameters that are read when the Raspberry Pi boots. Open this file:

sudo nano /boot/config.txt

Add the following lines to the end of the file to turn off built-in LEDs on Raspberry Pi when it boots:

# Turn off PWR LED
dtparam=pwr_led_trigger=default-on
dtparam=pwr_led_activelow=off

# Turn off ACT LED
dtparam=act_led_trigger=none
dtparam=act_led_activelow=off

# Turn off Ethernet ACT LED
dtparam=eth_led0=4

# Turn off Ethernet LNK LED
dtparam=eth_led1=4

Reboot Raspberry Pi in order the changes to take effect:

sudo reboot

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