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Some history for you---several years ago Hitachi began along with others to have issues with the optical light engines.
With a mix of high heat from a lamp into the engine (it has a blue,green and red section inside---guess what? BLUE is the first place that gets the heat and is damaged----minus blue and you have red and green which equals YELLOW.
Several of their sets made about 6 years ago (research 50v500) had exact same issues and were settled in a class action lawsuit.
The issue can but does not always affect the entire screen.
The question really is: This set really worth the part and labor cost for the repair?
On that earlier model I replaced under warranty over 40 of the engines. Also Sony and others have had similar issues some of which were settled in court.
the color filters are burned from heat there are three small glass filters one is red one is blue and one s green They are in the light engine.I know I have the same tv and the same problem.you have to take the light engine apart or you could replace the light engine.a lot of plugs and screws to take out just to change three colored glass plates
I have been told by a local repair person that Hitachi might replace the light engine at no cost because it is such a big issue... has anyone hear about this... I am going to contact them directly also.
TV shows large red spot in middle of tv when dark show are on, you can see it more. Now blue spots on upper right side too. Spend way to much on this tv to have these kinds of problems only after 3 yrs.
I have recently developed the same yellow spot problem on my Sony KDF-E50A10 50" LCD television...a large yellow circular hue that takes up the bottom center of the picture and is especially noticeable against a white background. It has been diagnosed as the optical block (light engine) and without an extended warranty Sony refuses to assist with the repair cost. Repair was estimated at $1,100 plus tax and travel fees to my home. So you see, it is not only a Hitachi problem. You would think they could build something that would last more than two years considering the initial cost of over two grand for the TV !
Repair Kit for Hitachi convergence Chassis DP-14G KIT10 Includes 2 pcs STK392-150 , 1 each of the following 1W axial lead fusible resistors: http://www.eserviceinfo.com/ http://www.digitalhome.ca/forum/search.php http://www.digitalhome.ca/forum/showpost.php?p=564268&postcount=220 http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html