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             HP OfficeJet 6500 Printers - Replacing the Printhead. Introduction. Install a new printhead assembly when the existing printhead assembly is damaged or is incompatible with the product. Replacement printhead assemblies are only available from HP Support or authorized service providers.
             The message Printhead Problem or Printhead Appears to be Missing or Damaged displays on the printer control panel, and the printer does not print. Solution. Follow these steps in the order presented until you resolve the issue. Step one: Remove, clean, and then reinstall the printhead.