@Red, post #4
@exolon, post #9
Green power LED: This is connected to the 3.3V power rail. It must light up as soon as the board is connected to a power supply. Make sure you have a stable 5V power supply connected to either the DC jack (prototype boards) or the micro usb connector (series board). You need at least 200mA for the board itself to boot, during operation at least 500mA is mandatory, 1A is recommanded if you want to use USB peripherals.
@Red, post #10