Anybody had a problem with an HP printer claiming it is out of paper, even though there is a stack of sheets in it? In this case, the printer is a Photosmart 7520. I cannot see any bits of paper which may be preventing the correct operation. As far as I can see, the thing that presses against the paper is complete, and moves correctly, though the switch I suspect it operates may not be working correctly.
Did you manage to fix it? If so, what was the solution?