Hello everyone. I have this set since two weeks and now it is developing in the top left corner of the image a slight blue/green blot (spot). I'm using a DTT3500 Creative sound kit, that have shielded speakers, but even though I've moved them away from the TV, and the problem persists. I've also disconnected the TV and all the electric equipment near it from the electric outlet for a night and the next morning the situation remainded. What do you think about this problem? What can is causing it? Regards.