I recently tried to breathe some life back into an old Officejet 7410 for my parents. The printing is fine, but the scanning and the copying respectively produce images and copies that are mostly solid black, except for the first inch or so from the top of the original page.

At first I thought this was a bulb problem, so I replaced it. Unfortunately, the problematic behavior is still there. I've tried resetting to factory defaults. Still no improvement.

I don't think this is related to my OS or drivers, since the copying is also affected even when the connected computer is powered off.

So... my question(s): What is the cause of this bad behavior? Given that, can my Officejet be repaired? If so, how?

Thanks in advance.