56HM195 - "Auto Aspect Ratio" feature

I've just picked up a used Toshiba 56HM195. It has a "Auto Aspect Ratio" feature (page 74 of the owner's manual), which when enabled should display windowboxed (black bars on all four sides) 4:3 images in "TheaterWide 2" display mode, which zooms in to eliminate the windowboxing. 
We have some SD recordings on our TivoHD. The Tivo is connected to a Component switcher, and the switcher is connected to one of the sets of Component inputs on the TV.
Enabling the TV's "Auto Aspect Ratio" feature does *not* make the windowboxed Tivo 4:3 images display in "TheaterWide 2" (zoomed) mode. Instead it still displays in "Natural" mode and so is still windowboxed.
Any idea what the problem is?
Thanks,
Greg

The aspect ratio setting of portrait, landscape, or auto, controls what orientation the app opens up in. Most times you would choose portrait or landscape, but in doing so you’re saying that the app only uses that ratio. If you have an app that is both portrait and landscape, then auto might make sense. You would also want to include all of the possible splash screens, not just the portrait or landscape ones.
Auto orient controls whether the app will rotate around when the user turns the device 90 or 180 degrees. For iOS apps you would most likely want that to be on, because it’s a requirement for the iTunes store. But, as an alternative you can have it set to be off, then change that at runtime to be on at the right times. One example use case would be if part of the game play involves using the accelerometer, you wouldn’t want the screen to rotate on the user while playing that part of the game.

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