Hello, I use a Workcentre 24 to print my weekly newspaper. I print 1,200 two-sided black and white 11 x 17 pages per week. I just finished this week's print run, and went back to print a few extras when they started printing with dark bars that are in the same position on every print. I've tries adjusting quality, attempted printing color, and fiddled with the consumable elements to no avail. Does anyone know what might be causing these lines and what I can do to address it?