My Thomson Scenium 32WT45U TV/DVD will not remember any aspect ratio format setting in the set up menu other than 'auto'. It allows selection of 16:9 and 4:3, but forgets these and reverts to 'auto' when the channel is changed. This only affects the tuner presets - AV inputs are ok. Therefore when watching a TV channel, the picture will suddenly 'zoom' and the top of the picture goes off the screen. It can be manually brought back with the zoom control, but it's a bit annoying. ALSO - I managed to get into the service menu ONCE (hold volume minus and channel minus then switch on with front panel switch), but subsequently cannot repeat this. Does anyone have any comments on either of the above observations? Any help would be appreciated.