Paper kam that wont clear

Canon Pixma IP5000 kept giving the blinking yellow light 3 times. Could not find anything. I tried the manila folder forcing a manila folder in on power up through the top feeder as suggested for another Canon Pixma. The folder kind of jammed and pushed it back out of the feeder. And out came a small piece of postit. Couldn't see it so it was somewhere inaccessible and unviewable. The bigger paper was enough to loosen and expel it with the manila folder. I'm guessing the people who put the higher mil (thicker) paper through, clear what ever is causing the problem even if they don't see what is ejected or forced out. Don't know if this will work for you but it thats what happened and the printer works fine now.