03-01-2017 10:43 PM
It sounds like you may need to clean the print head. You can do so by holding down the STOP button until the ALARM lamp flashes twice, and then release it immediately. The cleaning will be complete when the ON lamp lights after flashing. This takes about 30 seconds.
If the results do not improve after two of these cleanings, please reach the support team for Canon Australia by clicking HERE.
Hope this helps!