Hi Chriscal1,
With the later firmware versions, the serial number is no longer the admin password for the iP8720.
To determine the password for your printer, please follow these steps:
1. Turn your iP8720 on.
2. Load a few sheets of plain paper into the the paper feed.
3. Please hold down the Resume button until the Power light blinks 6 times, then let it go.
The Resume button is the middle button.
One page will print.
On the page that printed, the Default Password will appear at the bottom of the list.
https://support.usa.canon.com/kb/s/article/ART115379
Did this answer your question? If so, please click the Accept as Solution button below so that others may find the answer as well.
