Hello My name is Ian ~ I am not on the site constantly so please be patient whilst waiting for responses to you queries
Have you gone from analogue to digital by chance ie not throught a set top box?
We have no set top box on this TV but where the tuning gives me the option I choose DTV tuning from antenna.
OK give me a minute
Bearing in mind that this is a new TV in the first instant I would contact LG on the attached link and ask there advice ~ their technical helpline from personal experience is very good and they will direct you in the right direction. My concern is that if we start messing around you could invalidate you warranty on what may be a know fault to the LG guys ~~ http://www.lg.com/uk/support Hope that helps, if so kindly rate the supplied information ~ you can always come back on here at no extra charge if you require further help. ~~ Ian