help with TV Picture Problem

[Nicks Fan]

I am house sittig for a friend and I accidently messed up their Tv. It is a Sony Trinitron Tv with three butons below the screen. One of them is Power and I used it with no trouble to shut the tv off. The next night by accident I hit the chanel up button beside the power button and now the screen is all distorted (Like when you try to watch a Pay per view Movie without paying and you get that screen that is fuzzy and skips etc) They have a Rogers Digital Cable Box and three remotes for diffeent machines hooked up to the TV (Digital box, DVD /VCR Combo and TV remote) and I can't figure out how to get it working.