9.Close the access door, and check if the error message has gone away.

10.If you still receive the error message, turn the product off, and then on again.

NOTE: If one ink cartridge is causing problems, you can remove it and use the single-cartridge mode to operate the HP ENVY 5660 series with only one cartridge.

ENWW

Ink cartridge issues 73

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HP 5665, 5660 manual Ink cartridge issues