I have a problem with my C4780. The ink is low and I opened the cartridge door. But the ink wells are hidden behind the leftside. I was looking for a button to move the inks to the center when I accidentally popped the ink on the right. It came loose but not completely out. I can't push it back to it's well. Now it is stuck and I when I turn on and off the printer, the cartridges can't move ( it made the effort but the dropped ink is preventing it from moving freely). HP can't help, they offer to send in a refurbished one. Can someone help me to get out of the mechanical jam so I can keep my own printer? Thanks.