Well, Since the cartrigde has been working it could be just a matter of contact. Try removing the cartridge, and clean the contact surface on the cartridge with a alcoholic based cleaning liquid on a soft cloth. Tis might help solve the problem.
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I tried that, still won't work. It looks like I need to get a new cartridge but I don't understand why it keeps telling me I have the wrong one installed.
I did clean it but no use.
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