For questions involving the Pi's SD card activity LED (labelled ACT). Use this tag where the LED's operation is relevant, for example if the LED is functioning incorrectly, or may be indicating a problem with your Pi.
Questions tagged [act]
21 questions
5
votes
4 answers
Can't turn on ACT LED on baremetal Pi3
I'm trying to run some bare-metal code on my raspi 3. This is my first time doing any sort of bare-metal programming, so first things first I want to turn on my ACT led as a kind of hello-world type program but I can't for the life of me get it to…
Ripread
- 153
- 1
- 3
2
votes
1 answer
Normal Work of RPi 3B+
I am newbie and i want to understand watching only on indicators, is Rpi 3 B+ work quite well?
I mean, are green and red lights should glowing both permanently together or red light can glows permanently and green light can fades meanwhile?
Also,…
tcma13
- 133
- 6
2
votes
1 answer
Pi 3 on-board LEDs
Can I make one of the LEDs on the Ethernet port do the same thing as the ACT led?
The case I've got my Pi in, does not allow me to see the ACT led so I do not know when its okay to cut the power after shutting down the Pi. I can't seem to find out…
kyran bullard
- 139
- 2
- 2
- 11
2
votes
0 answers
ACT led blinks 4 times
My raspberry pi 3 B won't boot. The ACT led blinks 3 times, then it blinks once longer than before, then repeats.No signal on 7" touch display, no signal at HDMI, config.txt hasn't been messed with.tried 2 SD cards. one was the original, just…
Henrik
- 21
- 3
2
votes
2 answers
RPi 4B ACT solid green
I am new to raspberry pi and I recently decided to get RPi 4B.
Anyways, I was doing a small project and when I finished, I pulled the jumper wires from the breadboard and the wire connected the GND and 5.0v touched which caused the RPi to reset.…
WarHawk
- 23
- 1
- 3
1
vote
3 answers
Raspberry Pi 3 Model A+ Faint green pinprick light steady flashing
I just loaded an SD Card with Raspbian lite for the Pi3 Model A+.
It does the normal rainbow screen splash, followed by the 4 raspberries and a blinking cursor underneath. The pi never completes its bootup.
The power led stays constant and…
RenegadeAndy
- 129
- 3
1
vote
2 answers
Act LED flashing 3 times quickly after boot
The ACT LED on my Raspberry Pi 3 B+ is flashing three times very quickly after boot.
I am not able to connect via ssh (the error message is "Connection Refused" – despite ssh being enabled), but I am able to ping it.
It's connected via Wifi, so I…
Unkn0wn
- 23
- 1
- 6
1
vote
1 answer
Raspberry Pi 3 will not load SD Card
I have a very strange problem and have gone through 2 pi's atm. I have Raspberry Pi 3, I put an OMV imageon it [1]. The first time I boot up the Raspberry Pi it outputs and has a Kernal error:
I try rebooting it with different SD Cards and…
ZUKINI
- 11
- 4
1
vote
1 answer
Green Led (ACT) is blinking for mmc0 without SD card activity
The green led (ACT) on my Raspberry Pi 3 is set to mmc0 to flash on SD card activity via
echo mmc0 |sudo tee /sys/class/leds/led0/trigger
However, it flashes much more often (randomly every few seconds) than it should according to
iotop -bktoqqq…
Frank Breitling
- 1,009
- 1
- 15
- 30
1
vote
2 answers
ACT LED stops blinking, Raspberry Pi booting and reading from card as always
I couldn't find a similar situation. I noticed that the ACT LED on the motherboard of my Raspberry Pi 4 stopped working. I used to see it blinking while restarting the Pi, now it's gone. It is possible that the LED is broken? Is there way to test…
andrewt
- 21
- 4
0
votes
0 answers
Raspberry Pi Zero W not booting(ACT green led weak blink)
Raspberry Pi Zero W ACT green led weak blink and not booting. But sd card is working in Raspberry pi 3. Stretch and Jessie installed but both did not work
What is the problem? SD card Samsung
Video:
https://www.youtube.com/watch?v=Lf2acvYb9dA&t=11s
A. Atanur
- 1
- 1
0
votes
1 answer
raspberry pi no rainbow screen
I have an another problem. My RPi (3 model B+) not booting. No ACT led, no rainbow screen, only PWR led.
Here is what i checked:
- Power supply (Raspberry Pi Universal Power Supply 2.5A, 5.1V Micro USB B, 1.5m Cable)
- Kingston DataTraveler 100 G3…
Minecon724
- 29
- 2
- 7
0
votes
1 answer
Troubleshooting Raspberry Pi 2 Model B with Solid PWR and ACT LEDs
I have two Raspberry Pi 2 Model B v1.1 units. The first unit, which I will refer to as the "working" one, has a flickering GREEN ACT LED (but no lit RED PWR LED), indicating that it operates normally. In contrast, the "faulty" unit has a solid RED…
cascavelho
- 5
- 2
0
votes
0 answers
Why doesn’t the ACT light blink or even turn on?
So I have the Pi 3 B+ and I haven’t used it in a long time. So I decided to bring it out and try it. When I turned it on Nothing happened. Only the power light was on and nothing was even showing up on the monitor. So I looked at it and the ACT…
0
votes
0 answers
Raspberry pi 4 1 short 1 long blinks
I have a Raspberry pi 4 model B, have been using it for more than a year. A few days ago it started having problems. After 10/20 seconds from startup it gives an error pattern that looks like 1 short and 1 long blinks on the ACT led.
I haven't found…
luca
- 9
- 1