Try taking off the lens. Clean the contact points on the lens and the body of the camera, The contact points look like a row of dots where the lens connect to the camera body. The contact points can get dirty or greasy after some time. Using a micro-fiber cloth and denatured alcohol to clean the contact points. Be careful not to touch the inside of the camera body or the glass on the inside part of the lens. Reattach the lens and see if that worked. If not, try a different lens. Still not working... sorry that's all I got.