Problem ink! Tells me the printer. I thought to change the printer due to an ink problem despite buying original cartridges. Cleaning hours on the head, search the HP website for discussion with the HP hotline, Research drivers (Mac OS X Mavericks), of hard reset, dozens of test sheets and cleaning heads, lots of heads alignments, lots of settings to change in hidden menus and then it's good. But the cartridge is emptied to 2/3 !!!!! Problem cartridge storage, batch cartridges rejected by quality control? Go figure! If I had bought on the HP site, they would have taken me under warranty cartridges for an "ink problem". The chip is inside is a real black box.