I used to repair a TV now and than in the past and my friend is running a TV repair shop.
Recently he said that he used to be prepared to put his hand in fire for Sony, but now even they have gone crappy.
That's what todays economy is all about, quick product cycle. You're expected to replace your set in a couple years anyway and buy a new one. They try to persuade you that the technology has moved forward so you're sort off eagerly waiting for it to fail after a few years so you can get a new hyped one. This goes for a number of high-volume products where competition is stiff.
Preferably it dies just after the warranty goes off. A very competent engineer (and a profesor at a local EE university) I know has told me that the set is "programmed" to die in a couple years. AFAIK the power supply unit.
SioL