Line going down page

Question

My Canon DR-2050C scanner started putting a line down the page of the image. I do routine maintenance on the scanner and when that started, cleaned the rollers, etc. I cleaned the glass, can't tell if there's a scratch, but I still have a straight line going down the page. I've never had this happen before and use the scanner on a regular basis. I checked the counter and I'm only at 2300 pages. Any suggestions?