We are on our second new SONY projection TV with built in digital box. On the first set, the picture took 10 minutes before it stabilised on any digital channel, then it was OK on any channel for the rest of the day. It soon took longer to stabilise and was swapped for a replacement set which is exactly the same. It is on a loft aerial which was fine with a previous TV and separate digital box. On digital, the picture stabilises if it has still graphics like film titles - black background and big text - then breaks up on a normal picture. Analog channels are OK. Any ideas please?