The key to almost all tweaks in TVs comes through the service menu. However, getting to this menu is usually undocumented, and you'll need some help in finding it.
It's a general principle that TV manufacturers consider TV consumers fairly unintelligent. As a result of this (usually incorrect) assumption, your TV probably has tons of undocumented features and more than a few calibration menus. Lucky for you, many popular brands of TVs have their service menu access codes available on the Internet, through sites such as http://www.keohi.com/keohihdtv/. Even more conveniently, various web sites' information has been aggregated here, to detail just what you need, all organized by brand.
These are just the codes to get into the service menu. If you want to go on and mess with convergence, focus, and so on, consult the other hacks in this chapter, as well as online resources. Trying to document every feature of every brand would require a separate book.
There are actually two ways to get ...