I recently replaced all 4 toners in my Canon MF634CDW color laser printer. Now there are black dots along the left side of prints. The dots are equally spaced 2.5 inches from the left side of the paper and there is a black dot approximately every one inch from the top to the bottom of the paper. I printed a blank MS Word document and the black dots still appear on the print out. Is this a toner issue? Or is there a roller inside the machine that I need to clean? If it is a toner issue, is it necessarily the black toner that is causing the issue? I don't want to re-buy all 4 toners. I already did the Clean Fixing Assembly and Clean ITB functions in the Maintenance menu multiple times.
