I've just bought a new Toshiba 37c3030 37"LCD TV and am very pleased with it. Sound is good and picture quality is excellent from both broadcast and from DVD's played through my Sony DVD player. But when playing a DVD there's a light humming sound when the scene is bright (no humming during dark scenes). This is my first LCD flat panel TV so I'm a bit of a novice. Any ideas what might be causing this? I have the DVD player connected with a scart lead.