My HP OfficeJet 5510xi All-In-One displays this message: "Print Cartridge Error. See the product documentation for details." I have tried cleaning the contacts on both the cartridges and the the machine twice--no help. I recently installed a new HP57 color cartridge (HP--not an off brand). All was working fine for a day or two, then the error message began, and I havn't been able to rpint since. Thanks!
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