I've heard that we need to check resistance between 3rd and 21st pin on the printhead to check if it is shorted. If there is +1M ohm - it is shorted. Should be O.L. - open line.
Sir Pls Help Canon Pixama G6070 aur Hp Smart Tank 790 me konsa lena chahiye for photo and some heavy print and long life kiski hogi . ya fir koi aur brand ka printer sahi hai ?? pls reply