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4 votes
Accepted

RPi-2 : Red led flashes after few seconds

Sounds like you may have a power issue : Red power LED is blinking A blinking red power LED indicates problems with the power supply. On model A and B, it is hard-wired to the 3.3V power supply rail. ...
CoderMike's user avatar
  • 6,997
4 votes

Lightning bolt then system crash. Only red light is on

it probably is a power supply problem. The allowed voltage range is the normal one (for 5V logic) 5.0V ±5% so its a the range between 4.75V and 5.25V. Note that the lower limit of 4.75V is more a ...
Liam's user avatar
  • 661
2 votes

Raspberry Pi 3 B+ not booting up and SD Card socket overheating

It seems that your original SD Card is broken, maybe with a short (short circuit). Only inserting a blank new SD Card into the card slot only verifies that it doesn't heat up and should be electrical ...
Ingo's user avatar
  • 42.2k
2 votes
Accepted

Normal Work of RPi 3B+

The red LED is the power indicator, it should be on whenever you have your pi plugged in. The green LED is the sd card access indicator; it goes on when the pi is accessing the sd card (which is like ...
Benjamin Ashbaugh's user avatar
2 votes
Accepted

Raspberry Pi 3b+ - Turning off power LED from /boot/config.txt no longer works with kernal 5.15.56-v7+

Yes - I seem to recall that the firmware controlling the Power (red) LED is prone to change. Perhaps the bug report will get this fixed eventually, or perhaps it won't? In either case, the sysfs ...
Seamus's user avatar
  • 22.4k
1 vote

Raspberry Pi 3b+ - Turning off power LED from /boot/config.txt no longer works with kernal 5.15.56-v7+

This is already fixed. As per a comment in the bug report that Seamus shared in his answer, you have to remove: dtparam=pwr_led_trigger=none Summarizing, you only need the following to turn the power ...
bustawin's user avatar
  • 111
1 vote

Red LED dim when powering on, and gradually brightens; No green LED; Potential power failure?

Just came back to this question a while later, and turns out that when I tested the Pi 2 days later it worked fine. There must be a polyfuse or some stray dirt that was stopping it from turning on. So ...
Architect's user avatar
  • 111
1 vote
Accepted

Powering RPI 3 and using relay from same source

I use my Raspberry Pi to control my grow lights using a power relay This is a great way to control line voltage with a Pi and lets you do all sorts of fun stuff on your pi. for example, I use the Pi ...
OyaMist's user avatar
  • 1,119
1 vote

Powering RPI 3 and using relay from same source

The RPI 3 requires 5 volts to operate. This is normally supply using the RPI 3's micro USB port. As the RPI 3 has the ability to run faster on multiple processor cores, it is stated here to get a ...
st2000's user avatar
  • 384

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