Sony 32KDLW4000. TV locks on a digital channel and cannot switch channel either with remote or tv button. Finally it switches by itself to the previous channel it was. This happens usually on certain channels only.

Have tried to switch the tv on and off and it only works if i leave it off for some minutes. When the problem occurs the other channels seem to work, it only locks when you try to select the 'faulty' channel.

I guess it cannot be the specific channel as now it is 2 of them that get this problem.

Thanks in advance for any suggestion.