I have a recently purchased Nikon 5100. Since purchase there is a series of two lines (in the same place) in the frame that show up on the pictures. Any guesses as to what they are and how I can get rid of them? The lines go the length o the picture -top to bottom and anything in that section of the frame will have the two lines. It happens with and without flash.
You can see in photo below on right hand side next to the two girls on right the 2 lines clearly.