I have the above TV connected to Audiolab 6000a via optical cable. The sound cuts out for about 1/10 of a second, every 5 or so seconds, which makes for very annoying listening. I had to set the sound as 'TV + Optical Out', turning the TV volume all the way down, this was because of a 'static' sound on digital channels. Do I have a dodgy cable or is something else happening? Thanks.