Canon printer is one of the main Brand in printer class. it is frequently used at homes and small offices. Occasionally customers face hassle where Canon Printer keep displaying offline, But splendid answers are there to get rid of this mistake. So if your Canon PIXMA TR4520 Offline then follow the instructions given on this manual.
Why Canon PIXMA TR4520 Offline? What are the steps to bring it back online?
Resolve Different types of issues on offline printer with the help of below links.