Question about Sony KP-57HW40 57" Rear Projection Television

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Sony 57" it just started to go quick flash of a blue screen, then back to normal picture, then starts to turn it self off. the amount of time the tv stays on becomes shorter and shorter.

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This is almost one I'd prefer not to answer because it's not good news and usually posters just kill the messenger.
In this particular model sony the focus block P/N 8-598-955-31 are common failures which can cause the flickering but not usually shutdown. Also a common failure is the crts used in making this unit and they are not economically repairable. The symptoms there are exactly what you've described, flickering then shutdown. The flickering is caused by current leakage in the crt and are especially prevalent in serial numbers beginning with 90xxxx. Sony even put out a bulletin on this issue some time ago and offered part warranty on the parts for replacement. That offer has since expired.
You can remove the lower front panel and expose the lower area of the crts and focus block. If you take the the rubber end of a screw driver and slightly tap on the neck of each crt while watching Tv you can confirm the described failure of the crt if it flickers as you tap. We techs call this the slap and tickle method but it is VERY effective in this case. This does not in ANY way rule out having it diagnosed by a qualified technician, which I strongly suggest, it simply helps in confirming the diagnosis yourself.
Sorry
Bill

Posted on Apr 09, 2008

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It might not be worth fixing

Good luck


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http://www.somelifeblog.com/2007/06/sony-projection-tv-red-line-repair.html

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