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 ...
I found a work around that simply allows me to add a few lines to the boot config file /boot/config.txt
To disable ACT LED, add
To disable ...
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 ...
QUESTION - How to change LED function:
Green LED: Power (indicate power is applied)
Red LED: (indicate) Read and write activity of my SD card
Add the following lines to your /boot/config.txt ...
You can re-route the act led to a GPIO pin by adding the act-led overlay to /boot/config.txt.
Example setting act-led to GPIO18:
Info (see e.g. /boot/overlays/README)
If the LED blinks 4 times when you power it on with NO SD card is inserted, there is a chance that you have an SD card error: https://www.raspberrypi.org/forums/viewtopic.php?t=250183
... had solid ...
Your RPi4B is dead. The fix will cost somewhere between £35 and £55 depending which model you've shot dead.
Never pull wires off a powered up Raspberry. Power down first. Check wiring, check it again ...
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 ...