Print system error. Reset possible?

[PError]

I have an office jet 8600 and 8610 printers. After replacing empty cartridges, both have been reporting print system/damaged cartridge errors. Using official HP Cartridges. Rebooting hasn't helped, Printers were working fine. Have checked the contacts in the cartridges and print head/carriage, also the print head is properly installed and clean.

You no longer source the cartridges for these printers, so I have several sealed HP replacements from  e-bay. Recent dates on the pkgs. Oddly enough a few of these 951 cartridges are rejected by the printer as being incompatible.

Is there any method to reset or restore the printers?

[AndressaR]

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