Question about Sony KP-51HW40 51" Rear Projection Television

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Getting blue picture from KP-51HW40 51" Rear projection t.v..

My Sony KP-51HW40 51" rear projection's picture is very blue. Also every so often it gets extremely blue then shuts off. I thought it was a bulb problem but i'm not sure.

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Your assumption is correct.

Posted on Jul 29, 2008

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Lamp part number


KP-43T70 is a CRT based rear projector and does not use a Lamp like newer LCD/DLP projectors. It uses 3 (Red, Green, Blue) glycol liquid cooled CRT's (like the picture tubes of yesteryear) to produce the image/light as opposed to a Lamp.

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1. picture is getting darker 2. there is a green outline when the brightness is turned up


Hello ksolovy, i understood your Problem with the Sony KP-53V90 53 in. Rear Projection Television,In fact i encountered already that kind of problem you have it now. Check first the color wheel im sure that the blue section of your color wheel was burned and the blue color turn to dark; That's why you have seen dark picture, Re-place color wheel.

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1 Answer

Have Sony Model# KP-57HW40 Big screen rear projection tv..Has blue wavy lines across screen, and sometimes flashes blue, can you give me assistance??


Blue Picture Tube , bad Video IC on Blue CRT board.Or Blue screen drive control to tube needs to be adjusted down some.

Most Likely Bad Tube!

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Blue screen


u have bad blue picture tube , $300 - $500

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sony rear projection KP series are know for having bad utbes after while..ihad seen the blue tube goes on most.

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I have a rear projection Sony 52 " about 10 years old. The picture is good but there are blue curved lines.


The blue CRT is getting bad, you can try turning down the Blue CRT drive control slightly which may slow the progression down some, but eventually the Blue CRT will need to be replaced

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I need a blue picture tube re-necked / rebuilt


Go to the following link and leave your model number in a email and list which tube you need, they have access to just about any new replacement tube that you need for Sonys. they dont list them all, but leave a email I am sure they will have what you need.Heres the link.
http://servicemanuals.vstore.ca/

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My dad has a sony rear projection tv and had this same problem. A shop had to replace one of the color tubes(?) (green, red, or blue) had to be replaced. The shop said this was common with Sony rear projection TV's.

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