I have a 2130cn laser printer. It's 1.5 years old and has printed a total of approximately 21,000 pages.

It has been working wonderfully up until about a week ago. When it prints now (b/w) about 75% of the page (left side) comes out blurred and splotchy. The right side (25%) is clear and crisp. I have tried new ink cartridges but this doesn't help. Is this printer just old and needs to be replaced or is there something else I can do to fix this problem.