Turbos.
I've just got my 550D and put it altogether, attaching the 18-55 Canon Lens. Just started to play with it and i'm getting no autofocus. As with any camera, on half shutter it should focus, and the manual says there should be a red light. I get nothing! I've switched the dial from auto to Av to adjust the aperture manually and it will not move from F00. WTF have i done wrong?!