Aporte original por: sigoshi ,
There are 4 LEDs, on the pi, two for the Ethernet port, and two separate ones. I assume you mean the separate ones, as these indicate power. Red is for power on. It being constantly on is nothing but an indicator that you raspberry pi is getting power. Its connected directly to the power source, and does not indicate any code running on the pi. Green is for SD card. It being off indicates that your SD card is not properly set up to boot the PI. follow the instructions for NOOBS to properly prepare your pi.