If you have a copier in Denver, I am sure you have gotten prints before with a line all the way down the page. It is a common problem. The most common reason you will see a line down the center of the page is because the drum has an issue, or even more common is because of a small piece of dirt on the thin piece of glass that scans the job.
One of the best ways to figure out if the problem is inside the printer or if it is the dirty glass is to try copying a page through the document feeder and then try copying off the glass. If the problem exists both ways, the issue is inside the copier. If it is only when you run it through the feeder or on the glass, there is probably a small piece of dirt causing the issue for you.
We love helping people with their copiers, so we hope you will give us a call if you are looking for a new copier in Denver!!