For Pixma ip3600: From onscreen manual: Seven Flashes: Ink tank is not installed in the correct position.
Some ink tanks are not installed in the correct position. (The lamps on the ink tanks flash.) More than one ink tanks of the same color are installed. (The lamps on the ink tanks flash.) Confirm that the ink tanks are installed in the appropriate positions. Hope that helps Jack -- ubuntu-uk@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-uk https://wiki.ubuntu.com/UKTeam/
