I purchased a Hitachi 50HK25T4UK television around 12 months ago which as developed a bit of a strange problem. Every 4 - 6 weeks or so the TV guide (channel list) disappears completely and I'm unable to access any channels. The only way I can rectify this is to do a complete reinstallation as if I'd just purchased this. It'll work fine for another few weeks and then it'll happen again. Anyone had a similar issue and know how to rectify this?