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Models A and B The green activity LED (GPIO 16) may be written. Models A+ and B+ The green activity LED (GPIO 47) may be written. The red power LED (GPIO 35) may be written. The high USB power mode (GPIO 38) may be written. Pi Zero and Pi Zero W The green activity LED (GPIO 47) may be written. Pi2B The green activity LED (GPIO 47) may be written. The ...


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Having done some research myself I can't seem to come across any resources that explain how the LEDS work. I suspect the LEDs are something that are hardwired into the Ethernet port and are not controlled through software. For example take a look at this schematic of a RJ-45 Ethernet connector: You can clearly see the two LEDs labelled YELLOW and GREEN are ...


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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 its hard drive). When you plug the pi in, the red light should turn on and then the green light should turn on. After that, the green light will flicker and ...


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Okay - the problem was a silly one. I just unzipped the raspbian lite img file and copy pasted the disk image. I decided to reformat the sd, and use etcher to write the entire img file to the sd, and BOOM! It works!


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There's been a few reports of RPi 3Bs where there's no 3.3V power supply from the on-board voltage regulator. If you have a multimeter check between pin #1 and pin #6 on the GPIO header (carefully because if you short any pins you could kill a good RPi). Do any parts of the board get very hot very quickly? That's another sign of a dead RPi. If it gives ...


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Looks like my RootFS actually got corrupt. A lot of files in /bin and /etc were missing (e.g. passwd files + its backups and shadows), which rendered the whole system useless. The only thing I could do was reinstall the whole OS. I still do not know what those three flashes mean. I've had a problem with the loader.bin once, which resulted in a slow blinking. ...


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So, if nothing has changed, but something has changed it must be magic – or DHCP (which some would argue is the same thing). But seriously, from what you've described it sounds like the Pi's IP address may have changed and there is a machine (hence the connection refused rather than a timeout) at the Pi's old address that is not running sshd. The reason ...


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Expanding joan's answer: Raspberry Pi 3 B+ (1 GiB RAM) and A+ (512 MiB RAM) The green activity LED (GPIO 29) may be written The red power LED is connected to MXL7704 power management IC and is not available to software The USB power mode is fixed at high power


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I have also asked this question Why is the green LED (ACT) blinking without SD card activity also at the Raspberry Pi Forum and received this answer: by rpdom » Wed Feb 22, 2017 8:02 pm From what I understand, the Pi sends a "status" request to the card every few seconds to check that it is still there and working. That will cause the LED to flash, ...


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