Nikon D5100 isn't focusing when using the flip screen?
Added (1). I've had my Nikon D5100 for a few years now and kept it in great condition. Just recently I've been having trouble focusing with it. I did a complete reset and put it back to factory settings, and I'm still having a hard time. Whenever I use my flip screen and change my viewing from the view finder to the live view switch, it just won't focus. I keep getting the red box, and it won't let me take pictures. I have no idea how to fix this. Any idea what I can do? Thank you!
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