Bought one of these a couple of weeks ago. Very happy with it, but am getting problems with sound. When watching an external source (eg DVD player), I am getting sound breaking through from the TV tuner. It is more than loud enough to be distracting and I am wondering if it is normal. Also, if I turn off such a source, the television gives a loud howl and puts up a black and white pattern for about 1/2 second before detecting that there is no signal and blanking it out. It's not a major problem, but it didn't happen on my previous TV and in view of the above problem I am wondering if there is some kind of fault on the AV/TV selector circuits. Any help would be much appreciated.