If your Canon Printer Not Printing, you can have problems with the ink tap. Examine the ink lamps by opening the scanning unit i.e. printer cover. If there is still ample ink but the ink lamp is flashing red, the ink tank may have been placed wrongly. Make sure the ink tanks are in the right places. If the ink light is not lit, hit the ink tank's mark til it comes into its place. When the ink tank is completely installed, the ink lamp glows red.