I have a Canon iP4500 which I'm using with a Windows 7 Ultimate PC.
When I print with it, it won't print magenta. The cartridge is full, but my PC says that it's empty. It started saying that when I had the previous magenta cartridge in it when it was about a quarter full, so I replaced it and I'm still getting the same message.
I have removed the print head and cleaned it by running water through it and soaking it in alcohol overnight, but that didn't help. I've tried the various procedures under Printer Properties => Maintenance, but they haven't made any difference to the problem.
Please can someone suggest what I can do to correct the problem?