POSSIBLE SOLUTION: I found this blog that offered possible solutions... at least for some it worked... I hope it helps some of you.. as for me, still no luck. I found another blog that said to soak the printerhead in water and I did that as well but...
I too had this problem, and tried the reseating of the head twice... turned off for days and then tried again only to have the same message. This is rediculous, I cannot scan because of a faulty head alert... I also went out and bought new ink cartri...
