I have a sony tv model kdf-50e2000,and it has a problem with the picture going blank,the only light that on or flashes is the green (POWER) light. when turning the set on the green light blinks as it always do(when it was working normal) then goes to a steady green and the picture appears with a good picture. it will stay on exactly 20 seconds,then the picture goes out but the sound stays present for aprox 5 seconds after the picture goes out and then the sound goes out, this continues for 40 seconds and during this time in which the picture and sound quits the green power light is blinking, then the picture and sound comes back and the set works perfect for another twenty seconds. I purchased the set used and have no idea if the projection bulb has been replaced. I suspect the projection bulb but do not see the lamp light on or flashing , I have removed the bulb and cleaned out any signs of dust and Inspected the bulb,I do noticed a Bit of fog in the reflector part of the bulb , any help would be greatly appreacated George