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Print Head issues

HP Recommended
HP T120
macOS 10.13 High Sierra


I have a HP T120, it keep saying that the K (Black ink cartridge needs to be replace).

I purchased and replace a new printhead and it still says the same.

I tried Hard resetting the printer, restarting the printer, putting in the new print head and then restarting the printer

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It seems it is an issue with firmware

Can you please tell whats the firmware ?

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