I purchased a 55" Hitachi LCD Rear Projection television. It has been a nightmare. It had a defective light engine, which took months to remedy. Despite the fact that the light engine was acknowledged to be defective, I had to pay for the labor involved in its replacement. Now I have another problem. The unit wil not power up. I get a buzzing noise in the area of the lamp and the unit goes into protection mode with a lit lamp indicator. The lamp, which I replaced a relatively short time ago, appears to be fine -- so who knows? It could be the lamp. It could be the fan. It could be the ballast. It could be someting else. I am done with this craptastic tv and will never buy another Hitachi product again.