I ran my canon i960 after one or two of the cartridges were out of ink, I think. Got extreme banding on 2 prints, and a blue green cast over what was mostly a white and reddish-purple image (macro of a flower). Put in new ink tanks and on the next print, the print is smooth, no banding, but an area where the stem is usually green prints as brown. Will my printer be okay, or did I damage the printhead...what shall I do? Thanks, Virginia