I have a KD55XH9505, bought from John Lewis, TV has worked perfectly straight out the box connected to SkyQ box for the couple of months, but the last day or two the sound gradually goes out of sync. Checking the sound settings on SkyQ, all set to 'Normal', when checking the TV, the sound setting shows "Digital Audio", when I change this to "Standard", issue resolved, my problem is that after a while, TV reverts to 'Digital Audio' and the problems return. Any help or advice greatly accepted, driving my wife nuts, which by default, makes my life bad too.....