Pages print 3/4 then stops?

[Gary King]

When I print webpages, sometimes page 1 will print 3/4 of the page, then stop because of some sort of error that it doesn't tell me what it is. Just the 'need more pages' light is blinking on the printer (even though it is still printing a page - the page is stuck 3/4 of the way in, and even though there are pages in the tray.)

This is weird. For the Printer dialog, an error flashes for a split second; I think it mentions a mechanical error? Anyone know how to fix this?

 

[Gary King]

I have attached a screenshot to this post, which shows the dialog box that appears for literally a split second and then disappears, so it was hard for me to take a full screenshot of it.

It appears to read

... move. Turn the printer off, free the cartridge needle, and turn the printer back on.

Also, the message "GenericClass: waiting for device" appears for a few seconds as well.