I have a Nikon D5100 camera. It's a very good camera and I love it. I have had this camera for 2 years.
Yesterday I took some photo of my children. I pushed the (i) button to get the changeability of any setting in the screen. I changed the focus point to center. After this setting, the (i) button doesn't work. When the screen's light turns off and I press the (i) button, the screen turns on. If I press it again it does nothing.
What's the problem? Does anyone have any idea about this problem? Have I locked the (i) button somehow?
Thank for your help.