I just want to improve the picture. I do not feel the need for a perfect calibration, so I guess accessing the service menu isn't necessary.
The risk of bricking the tv isn't worth it.
what tv do you have and what settings do you have in the user menu?
Samsung UN46EH6030; Yamaha HTR-3066, SVS Prime Bookshelf Mains and Prime Center, Sony Core Bookshelf (SS-CS5) Side Surrounds, Rythmik LV12R; PS4, Xbox One, Xfinity X1 (CI CXD01ANI)