Do the lines appear on every photo and at the same location ? Horizontal or vertical or slanted across the photo ?
Try cleaning the lens (with a lens cleaning kit).
Otherwise, it may be CCD/sensor related - worn out, or dust on surface, etc.
please help, I have a Fuji Finepix S7000, about 4 years old. I love this camera and use it a great deal but I am getting random horizontal lines showing up on my photos. I can see them on the camera and also on the computer. I have not tried to print any but I'm quite certain they would show up there also. I have noticed some lines do have a pinkish color, or some are barely visible and throughout the whole photo. Can anyone tell me what this may be? I would send photos but I am not sure how to do this here....I have a wedding to photograph and I am wondering if I should get my camera repaired or if it's simply tired rechargeable batteries.