Tv works fine if trying to play a dvd but can't...

Question

hi, tv is 2 yrs old and out of warranty. had no problems with it and then one day it wouldn't receive any picture from the external aerial. tried rabbit ears, same result. have tried another tv through the same external aerial socket and it works fine. tv plays movies same as always. tv is not digital. is it possible for to fix this problem myself? if so, how?thankyou