I was having similar issues, where Canon 4x6 photo paper would not feed and I was getting jam messages, but I could not clear the error or get the paper to feed. Here is what I found, and unfortunately, the Windows Canon Inkjet Print Utility version ...
I had problem too - PIXMA PRO-100, several years old, lightly used to print, and the unit would not power up. However, all the recommended fixes about pushing the button repeatedly did not work. The Canon tech support recommendation solution was init...
