I have the same model where I turn it on and the colour fades out to a blue screen. My red and green lamps are burning out and it is recommended I change all 3. Red and green are readily available but the blue is only available for certain serial numbers. When I called repairs, they advised it would be $1K for parts, 2-300 for labour and 120 to have them take in the set. When I checked online, the parts are only $73 and $146 for the tubes but I need to find out the procedure to replace them myself prior to ordering. It does not seem to be a big job based on what I am looking at.