By the power button, the light bulb blinks several times(in different colors, gree, orange, and red) and turns off. I have had this t.v for about five years. Its model number is kdf-70xbr950 70 inch. We had a professional take a look at it and he said there is something wrong with the optic engine or lamp engine and he said we cannot get picture anymore. Is there anything I can do to make it turn on?! please and thank you.