Try reading this support page from HP. Hope it helps.http://h20564.www2.hp.com/hpsc/doc/publi...-c01997899

Use an eraser on the paper feeder rollers to clean .

U more than likely still have paper jammed where u can't see it. Have u lifted the main lid as well looking into the machines mechanics? There is a wheel that feeds the paper through machine . Spin a few rotations and see if more paper appears or comes out.