Dark / Black Line Down the right side

I have this camera. When taking pictures, there is a dark black line along the left side from the top to the bottom. It's not straight. When I zoom out it is thinner. When I zoom in , it gets thicker. The edge is blurred. This does not appear on playback of pictures taken with another camera nor during menu operations. It does show up on pictures I take with this camera. It's on the left edge.