Thick black vertical line down the entire length of the page

I have an HP LaserJet M1530 MFP Series PCL 6.  When I print normally there are no image errors, however whenever I make a copy I get a thick black vertical line down the entire length of the page. The black line is about 2 inches from the left edge of the page. The problem is older than the current print cartridge/drum which was just replaced a couple of months ago. The problem never occurs with normal printing, only copying, and occurs with every copy with no exceptions. Does anyone have any ideas/suggestions?