Printer always indicate ink error

[Melcom]

I have a Laserjet 1220c profession series which gives me a printing problem. When I give a print test command it does not go but rather complain with the catridge light indicating contineously. I have change the ink replacing it with a new catridges and still no luck.
What can be the problem and solution(s) if possible?

[.]

This forum, as it says in bold red font, is for HP CALCULATORS. This probably isn't the best place to ask.