Trying to fix an old printer for a friend , model above. Put new ink cartridges in , it gives the error cartidges not installed. Same error as before I guess. I came into this after the fact. I looked , wiped, visited Canon's website , read their trouble shooting guide , did what they said, same results. It's a charity repair and if I have to I will throw it in the dumpster but if it can be fixed cheaply I will do it, and eat the parts cost. Symptoms are power light on, on line light flashing, HQ light lit .Pull out the ink, reinstall them,Press the online button, I get 3 beeps. I installed them per Canons directions.