Originally Posted by utvnut
How do you figure which ones are burned?
Where did you find parts?
I google with no luck and I do not trust Sears, where I bought it. I have no problem spending 3 to 6 hundred to fix a $3500 set.
My center 90% is darker (reddish) than the edges.
The technician that helped me had a device where he could project the light from one tube at a time on the screen. The image direct from the green and blue tubes was terrible; each showed the burn-in which was well defined with the bars on the sides of the screen, and by seeing each color individually, we also found burned in images I had not noticed before, like channel logos, etc. I later learned that you can replicate this method by finding an image on a color calibration dvd like Avia, etc., which has an all blue, all green etc screen - but you will be best off with a tech who has the proper tools.
I called Hitachi's 800 number to find parts dealers and requested several distributors from them. Pacific Coast Parts in Oregon, I think, was where I found one of the last blue tubes available in our region for that model set. I lucked out and found the green tube on Ebay - a gamble, but it worked.
Not sure what is causing the reddish tint you're seeing on your set, since all the folks I talked to in doing my research said that the green & blue tubes have the greatest trouble with burn-in; red is seldom involved.
My set also cost $3500 and I also felt the same way about the repair and investment - if I can get another four years out of it, I'll be very happy. By then maybe LCD or DLP tv's will match or surpass the quality of CRT sets, but to my eyes they're not there yet.