Hi,
I never have had lines, just a grey black smudge at the top of the page about an inch wide and a couple of inches long. This occurs when I copy using the glass. I have cleaned and recleaned the glass, the lid and the Adf. When I use the Adf there isn't a smudge. Never has been. Plugging directly into an outlet didn't help. I have always had the lid closed when turning on the printer.
Thanks,
Carol