I have just bought the Philips 3500 series TV. Of course in the shop the picture was great. Not so much at home. The TV is connected to a CDC 5000 satelite decoder https://parabol.canaldigital.no/Kund...Tekniske-data/ via a Scart cable. I'm a total novice to this, but I guess this is the problem? The decoder and cable is outdated?