Problem with lcd tv after connecting to PC

I have just bought JVC lcd and tuned it. Then I connected it to pc (dvi-hdmi). Now I can not access lcd tv menu and setup tv, though it shows programs not from 1 to 20 as before connecting to pc but under different numbers 13, 55, 64, etc... Now I can only switch through this channels and change volume, but other menu functions of lcd tv do not work