please can someone help me ? I don't know if I have caught a button by accident or I have wrong settings etc, But when I am looking at the LCD screen to take a shot the screen looks very grainy. I have a panasonic DMC-G3 i have it on apeture 5.6 and tried all other f's in aperture mode and in shutter mode I have tried all S speeds and still have the same problem. when I take a shot the grain is not showing on the LCD screen in playback, not sure what they look like on the computer yet as I've not uploaded them as I'm taking shots in various modes, speeds and fs till I can resolve this problem, I am new to photography and very new to this type of camera. I have looked through the million pages of the PDF file operating manual and have drawn a blank as to what it may be. Thanks in advance Andrea.