I’m very new to all this, so please excuse any questions that seem very basic.
I bought an Arduino Mega 2560, and plugged it into my computer’s USB today, but I didn’t get a green light. Instead I got a blue light labeled ON, and a blinking orange light labeled AREF.
Is my board faulty?
Regradless of what color the ON led is, if it’s lite up it means the board has power on, as it should being plugged into a live USB port. The led near the Aref pin, is the pin 13 activity led and blinking means it probably has the sample blink sketch loaded on it and it’s running.
Start loading up other example sketches from the Arduino IDE examples files. Oh, and have fun.