I have a question. What would cause an error like On-Head ink rreservoir not refilling? I recently changed out an ink box and soon after it would not fill up said it was out of ink. But the ink level shows full and the ink chip in the back is correct. I have no way to tell if its clogged I don't even know where the reservoir is. And I only have one box of this ink so I can't swap it out to test for a faulty connection. Any ideas? Thanks a lot.