These are commonly called 'aspect' settings. Positioning is
usually a sub menu called 'screen'. If the OP can see that
menu on screen to get to it this may be all that is wrong.
My guess it's more than that, usually the owner exhausts
every possibility before tossing a 46" set to the curb.

Agreed, but the user might not be aware of them.

It's probably "something else", but it can't hurt to check...