What do you want me to do.
With my model tv (Panasonic CT-30WX54J) You press a series of buttons in specific order opening up the the service menu, where you can adjust about anything on your TV. This is what TV repair people use, and you have to be really careful about changing stuff in itI'm not technically supposed to have access to the service menu. Its supposed to be used by TV repair shops and such.
That is not hacking.
Hacking is hijacking or exploiting features of a larger object. For example, using Assembly to 'hack' hardware on playstations, either to modify hardware details or to leech data.
Another thing which could be considered hacking is modifying hardware in your computer to refine some details, like maybe overclocking.
Congrats on
finding'hacking' a menu on your TV, though.