Prints and faxes fine but get a vertical black line when copy

SOURCE: black line on my fax copies!

You sure can - the issue is that there is something on the thin strip of glass where the copy goes through from the feeder at the top - follow these directions and you should clear the problem right up.

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00671260&cc=us&lc=en&dlc=en&product=1119598&dlc=en&lang=en

SOURCE: 2 vertical, parallel, black, lines print on copy

Sounds like it could be bad cartridge or scanner. Try replacing cartridge first cause this is pretty easy to do and is alot cheaper.

SOURCE: Vertical line from document feeder

there is probably a dirt spot on the scanner glass where the document feeds in. try cleaning the thin glass under the document feed cover.

SOURCE: when copying or printing a fax, a vertical black line 2-3 mm line

try cleaning the rollers with water in the feeder at the top check the glass too too see if it's dirty

SOURCE: a black vertical line is on each copy.

Try the 6500 driver. I have seen that allow text print but no graphics. If line disappears, reinstall 7680 driver. If line comes back, contact HP about updated drivers, check their website OR try to get your money back. I have never had luck with this series of AIO.
Good luck.