My older 68cm tube tv got the color fringing in the top LH cnr and got worse each week until I got some advice to unplug it from the wall and leave it over night and it fixed the problem permanently until it blew up about 5 years later.
As for the blacking out I have bought a new 42 inch LCD which blacks out now and then for a second or two and was told I need a new digital antena which I did but it still blacks out. LG seem to think it's not their problem.
Cheers Daniel.