HP printer not printing black ink with brand new cartridge?

Ink has dried out in the print head because you left the printer switched on which not in use (which leaves a small electrical current in the print head; as a side effect, it heats the print heads very slightly). HPs of that age are prone to this fault. Take a cotton bud, dip it in pure cleaning alcohol, rub the print head very gently.

Leave no fibres behind.

I remove the entire print head and soaked it in water. I removed all of the dried ink on the print head and replaced it. It is printing fine now.

HP printers are good printers. I owned on lexmark and it was garbage. Canon's don't even make the list.

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