SOURCE: 42edt41a hitachi plasma tv went dark sound ok
sounds like your y and z drive boards over heated and need replacing...
SOURCE: Hitachi Plasma P50S601 no picture sound OK
probably needs new scan drive board along with upper and lower buffer boards. it wont be cheap and its best to have a tv shop do it.
SOURCE: My hitachi 50VS69A tv shows the picture green.
A green image is usually due to a lack of red or especially blue. the problem is becoming all too common with hitachi lcd projection sets. what happens is that one of the lenses in the optical block (or light engine) starts to burn or discolor due to overheating because of a blocked air filter causing poor air (cooling) circulation. Nothing can be done when the damage is too far gone except to replace the light engine-at acost that makes it not worth repair. if the damage is minimal than to reduce further damage the air filter should be replaced. Light engine needsto be removed in order to replace the air filter.
SOURCE: have a 55 inch hitachi plasma tv. The picture
Seems as if your high voltage power supply went kaput. This happens sometimes see the complaint
at: http://hitachi-home-electronics.pissedconsumer.com/hitachi-55hds69-plasma-tv-20100417178696.html
See: http://www.partstore.com/Model/Hitachi+Ltd/Hitachi/55HDS69.aspx for a list of parts and you can see if it is worth fixing
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