Having these cartridges used in my iP4950, he printed a few pages and then came the famous error "B200". Having searched the internet for this error message and everywhere just to read was "can resolve only the Canon service unit is scrap, print head over, repairs too expensive" and so I wanted to throw away the part already, because all the tricks like " Cleaning the print head, reset the waste ink tank error message, call Printing Service Menu (has never worked for me) and change settings "and so just did not work with me. In the meantime, I then already bought a Epson XP-625 (incidentally, a good device), as was Canon, and I'm pretty disappointed, partly because of the high ink consumption by the constant running of the cleaning program and the short life cycle of these devices (in typically max. two years with two Canon printers with me). Anyway, I found, just before I was about to step that thing in the garbage, even a set of ink cartridges iColor (at Pearl approximately 19, -). I began it and ..... the same error message. But I do not want to give up and have the tried here: Once the unit is turned on again the flashing lights in alternation and it locks with the error B200 itself. The printer can be outwitted, however, by being open at startup. Instead of B200 error the printer performs a self-test. Moment during the self-test, I then tried to print a test page. Twice nothing happened, except that the error message appeared B200. The third time, suddenly came the test page from the printer, and since he is working again. My conclusion: Because these cartridges I would soon wrecked my printer. For me and my iP4950 unusable.