I really doubt it. I assume you are using the ADF (automatic document feeder) so these 2 lines are probably little specs of dirt on the glass or more likely the plastic mylar the paper goes over is dirty and causing issues. Go to page 3 of the link below for instructions on how to remove the mylar. If you have a replacement which will be in a envelope in the top of the adf when you raise the cover use it. If not clean the old one and put back in and see if you get better results.
http://www.laserpros.com/pdf/HP%204345_4730%20ADF%20MK%20Instructions.pdf