imagePROGRAF Pro-300 Lines on my prints

[Tonydynamite]

 

 

Lines are appearing near the edges of my prints with the imagePROGRAF Pro-300. At first the lines only appeared where the image was bright, such as the sky. You can see that in one of my attached photos as the lines end as soon as the sky ends. But now the lines extend the whole length of the paper. Tried all maintenance options in the settings and nothing has worked to completely eliminate them. The lines are more distinct in some images and in others they are barely noticeable.