These posts are quite interesting to me. I bought my HP printer OfficeJet Pro 8600 plus from OfficeMax. I did buy an extra warranty from Offic4eMax that said they would provide a working printer if mine failed within a year of purchase. About 9 mos ago, I ran out of ink. I had the cartridges refilled at Costco, using their ink refilling service for $10/cartridge, which I thought was pretty reasonable. So, I had them refill all of my cartridges. Then, I put them back in and get that error message. I talk with HP, they say its because it can tell that its not 'their' ink, then I get new HP cartridges. I put them in. Now they dont work either.. now HP says, whole print head needs to be replaced to fix it. I then check in with OfficeMax, who will not honor extra warranty, because not HP product used with printer... Of course, the cost of the new printer head is almost as much as a new printer.
All of them are dirty b@#$%s that just want to make money.