Lg tv shows no signal after 20 minutes

[sjkay10]

LG 42LK450 TV works fine for approx 20 minutes then goes all fuzzy and shows no signal. Turn it off then back on and works fine for another 20 minutes

 

[trepxe]

LG 42LK450 TV works fine for approx 20 minutes then goes all fuzzy and shows no signal. Turn it off then back on and works fine for another 20 minutes

not your TV. check your cables or receiver/cable box.