Question about Sony Grand WEGA KDF-42WE655 42" Rear Projection HDTV

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Yellow blob in center of screen - Sony Grand WEGA KDF-42WE655 42" Rear Projection HDTV

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Yellow blob on your screen is caused by a defective optical block assembly. IF your set is under warranty, go to the nearest Sony service center and they will fix it for free.If its out of warranty it will costs more than a hundred box. optical block assembly is quite expensive part .

Posted on Oct 21, 2010

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SOURCE: hitachi 55vs69a yellow blob in center

you most likely have a bad light engine.

Posted on Aug 25, 2009

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I have a Hitachi CP-S240 projector. It works fine but now projects a yellow blob on the screen. It looks as if someone took a highlighter and colored on the lens - I cleaned the lens and that is not the...


I work for a company where we take care of around 7,000 projectors. We have recently come across this same issue in this model and several other Hitachi models. We have figured out that it seems to be a main board issue, after testing and checking of the lenses and other things. The main board ended up being the fix. Hope this helps!

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Hi, You are most likely seeing the effect of a defective optical engine. This is the part that processes and projects the picture onto the front screen. Physical anomolies can cause random blobs of colors and a distinct appearance of haze in the center of the pic. The only fix is to replace the engine, usually around $800 to $1000. THX

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1 Answer

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I have the same tv and the same problem, but my yellow is a cloud around the outside of the screen. My tv was recently moved, and a repair shop told me that sometimes in a move these tvs light engine takes a shock and causes a yellow "band" on the screen. I am hearing that these light engines are not cheap either. Hope this helps you.

Dec 01, 2009 | Hitachi 50V500 50 in. HD-Ready LCD...

1 Answer

Hitachi 55vs69a yellow blob in center


you most likely have a bad light engine.

Aug 20, 2009 | Televison & Video

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Hi, the convergence chips on the board are showing signs of failure. simply replacing the board will fix this issue.(convergence board failure)

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Blue blob on projection tv screen


CALL HITACHI THEY MIGHT HELP WITH REPAIR, HAS A BAD OPTIC BLOCK.

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2 Answers

Greenish/Yellow spot


Sounds like a scorch mark on the polerising filter, this can only be replaced by an engineer cost around £70 ($150).

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Apr 05, 2009 | Mitsubishi LVP-X300 Multimedia Projector

1 Answer

A yellow blob in the middle of the Screen


Recently, I had exactly the same problem on my VPl CX1 but also found the solution on the web. It is overheating. I cleaned the filter that is underneath the projector and also raised it slightly (resting on the lens cover and rear stand) for better air flow. Problem solved...at least for me.

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