Originally Posted by nismo604
That's the thing even the OSD doesn't get stretched, my display reads the input coming in as 4:3 even though I have select 16:9 on the Onkyo, and that's the OSD I'm talking about.
The Onkyo OSD setup monitor type setting described on page 97 of the manual is somewhat misleading. I believe it only controls the on screen display of volume level changes, etc. that are displayed if immediate display is set to on. It has no bearing on the aspect ratio of signals passed through the receiver from external sources such as a DVD player or on the aspect ratio of the setup menus.
There may also be some confusion here between the on screen display of control changes and the on screen display of the setup menu. They are two different things. Most people never see the OSD (I haven't) because they have immediate display set to off. Changing the aspect ratio of the setup menus is an undocumented feature that was first described back on post 6486. This post isn't entirely clear so I'll try to describe it better.
First you need to select an input, such as phono, that will display a solid blue screen. On my receiver I don't get this blue screen on my two HDMI inputs. The blue screen will have black bars on the sides if the setup menu aspect ratio is set to 4:3 and will fill the screen if the aspect ratio is set to 16:9.
Next, hold down the display button on the remote until the aspect ratio is displayed. It will either show 4:3 or 16:9. As soon as the aspect ratio is displayed, let up on the display button. Pushing the display button again changes the setup menu display aspect ratio. When the setting says 16:9 the blue screen will fill the screen of a widescreen TV. As you toggle back and forth between aspect ratios you can see the change on the blue screen. Once this setting is changed to 16:9 the setup menus will fill the screen of a widescreen TV.