My family and I have bought my mum a sammy 2333HD 23" widescreen LCD which she loves and it works great. Except the digital text. It works, but after a while it just says 'not available', even on the same channels it was working on earlier. I've no idea why it keeps doing this, any ideas? After resetting the tv with 'plugnplay' and re-storing all the channels, it works fine again, but when I switch channels it says 'not available' but if I leave it for a few seconds before pressing the text button, it works. After a while though, it just says 'not available' all the time. 