The picture jumps all over the place, particularly if it is showing an outdoor scene or something complicated (ornate furniture in the Antiques Roadshow for example); you can hardly watch it. Then the next time it is turned on the picture is perfect. As we have been told we will be charged if the fault isn’t in the television or HDD recorder (both under extended warranty) we want to rule out as many causes as we can before we take it to the repairer. It happens when you are watching the television o nly; when you are watching through the HDD recorder and even when you are viewing a recorded program. It is on all channels. The antenna is about 4 yrs old - is this likely to be the problem? Any advice gratefully received, as it is so disappointing to have a new system finally and then not being able to watch it some of the time.