Hi, John, and welcome to the forum.
The standby mode on your Yamaha will look like it's off. When you attempted to access the "Advanced Setup" menu, did you try pressing the power and "Straight" buttons on the front of the unit after turning it off, or did you just stop when it appeared to be off? If you didn't try pressing those buttons, give that a try. It's explained on page 55 of your owners manual.