My printer Canon IP 7250 don't print the black PGI color. Cleaning the nozzle was not a solution. After putting a new original printhead from Canon in my printer, I still have the same problem.
I then put the printhead in another and same type of printer (an old one ; I have 2 of this printers) and here the yellow color isn't printed.
I suppose that in the first printer the black "command" is failing and in the second one the yellow "command".
How can I fix this.
