Questions tagged [board-leds]
For questions pertaining to the onboard LEDs of the Raspberry Pi (PWR, ACT and ETH)
31 questions
-1 votes
1 answer
95 views
Red LED blinking even though voltage is sufficient
The Raspberry Pi 4 of the robotic club has always been powered by phone charger adapters without encountering any serious issues so far, only occasionally receiving low voltage warnings. Today, when I ...
- 107
0 votes
1 answer
278 views
Turn PWR LED off
At night my study lights up like a Christmas tree. I wanted a script to turn the PWR LED off but the commands have changed over time. How can I turn the PWR LED off?
- 63k
-1 votes
1 answer
159 views
Pi 4 booting but no green LED blinking
Raspberry pi 4 4GB booting and everything works fine. But no green light blinking. What is the possible reason?
- 1,852
0 votes
0 answers
1k views
Raspberry pi 4 Model B green light is consistently glowing when power is given
It was working fine and i shut it of and all of a sudden its blank the power light is lit which is a good sign but the act(green) light is lit too its not blinking which is not good. Tried every ...
- 1
0 votes
1 answer
1k views
raspberry pi 3 B v1.2 not booting no led light and heating on the backside
I haven't used the pi for a few month now , it was stored in good condition. so yesterday i flashed the SD card with rasbian bullseye and booted up the pi. every thing was normal except the wifi , i ...
1 vote
1 answer
1k views
Raspberry Pi 4: exchange power LED with activity LED
the default situation with the two LEDs on my Raspberry Pi 4 is as such: [situation now] Green LED: read and write activity of my SD card Red LED: Power I would like to change the the LEDs to: [...
- 13
1 vote
1 answer
971 views
Bare metal LED access on RPi 4
I've been playing with the Baking Pi tutorials, getting assembly code to work on the [bare metal] Pi 1 (BCM2835). I'm now interested in adapting the code to work on the Pi 4 BCM2711 but I'm struggling ...
- 338
0 votes
1 answer
660 views
Can't turn off onboard LED on Pi Zero anymore
I used to be able to turn off the green on-board LED with the following commands: echo none | sudo tee /sys/class/leds/led0/trigger echo 1 | sudo tee /sys/class/leds/led0/brightness This no longer ...
- 37
1 vote
1 answer
495 views
rfkill* LED triggers. What does it mean?
$ cat /sys/class/leds/led1/trigger none rc-feedback kbd-scrolllock kbd-numlock kbd-capslock kbd-kanalock kbd-shiftlock kbd-altgrlock kbd-ctrllock kbd-altlock kbd-shiftllock kbd-shiftrlock kbd-...
- 487
0 votes
0 answers
110 views
Raspberry Pi A+ does not boot
I have a Raspberry Pi A+ that does not boot. When I supply power both the ACT and PWR leds light up and stay on (no blinking). I get no image on the screen whatsoever. I tried: Formatting and ...
-2 votes
1 answer
94 views
3B+ locking up (blank video output) with red & green LEDs solid, requiring reboot. Which logs to check? [closed]
My Pi 3B+ (full config details at link) has started to lock up out of the blue (red and green LEDs on), requiring a reboot. Which system log(s) do I check to see what the problem might be?
- 1
1 vote
1 answer
380 views
Program Crashes on Systemd (systemctl), Works Fine Running Manually
I have a program (c program, run using a shell script) that uses sockets to connect to a server, retrieve data (on an interval) and (based on that data) power an LED matrix. When I run this program ...
0 votes
0 answers
183 views
Raspberry Pi 3 Model B Hung / Frozen, Including Clock?
I just happened to check on a Raspberry Pi 3 Model B with Raspbian Jessie 4.9.35-v7+ this morning and found it unresponsive. IIRC, there is an LED that is normally on when the Pi is on, so I thought ...
- 357
1 vote
1 answer
781 views
Control on-board led triggers from python
I know the trigger for on-board leds can be controlled from the command-line (or a script) I have a python program that I want to temporarily take over the system led blink it a little and return ...
- 119
1 vote
1 answer
3k views
Turn off onboard LEDs at boot
I know very little about Raspberry Pi and Python. I've been able to turn off the LEDs in the terminal using the following command: sudo su - echo none > /sys/class/leds/led0/trigger However, I ...
- 49