Question about Sony KDF-E55A20 55 in. LCD Television

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Red spots all over screen

Many red spots all over screen.

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 After downloading their driver update, it fixed the problem along with a few other issues.
You said SPOTS....not pixels.

Spots the size of a quarter are generally DUST that has gotten into the Light Engine and it's blocking the light off of the LCD panel.....

You need a TV Tech to Safely open up the unit and blow the dust off the optical path......the guy has got to have BIG 'Nads to do that, Because SOME units should just have the Optical Engine replaced, instead of opening them up to introduce MORE dust into a sealed engine.....

DON'T do this yourself, and remember THAT Big-Nad Tech is TRYING to save you money so you DON'T have to buy a NEW light engine anyways.....It's a Last-Ditch effort before spending $800 to $1000 for a Light Engine.....

Posted on Feb 20, 2009

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Posted on Jan 02, 2017

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Hello, I have Philips monitor, model: 15PFL4122/10 I use this for pc. Yesterday, then i was playing, i saw a red spot in the right of screen, and screen blacker. After about 10 min screen was with black...

My advice is to replace the main printed circuit board or the LCD panel.
Otherwise take it to an authorised repair agent, they can get the parts cheaper, being an authorised repair agent and see if you are able to get a quote for repairs. I hope this helps.Good luck.

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Based on the symptoms you are describing it seems like your T-Con board is going bad. This board is located on top of the panel and its main function is to make the pixels properly display on the screen. When this board goes out you can experience a few things and normally red or blue spots in the dark areas is one of them.

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the light engine is starting to fail,call hitachi to get assistance, they may help w/ the repair depending on when you purchased it

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1 Answer

Very large red spot when I have no picture on the screen

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Red spots

Its a light engine also known as an optical block

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its due to overheating of any component on the main board and needs to checked with a meter to locate the faulty and replace.

Jan 05, 2009 | Televison & Video

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I see a very large red spot on my screen now. I just replaced the lamp and it seem OK. Now I get a large red spot with no indicator lights. Is there a pending problem?

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pixels are bad/going dead. look up dead pixel issue on PSP for really good explanations, or just trust me.

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1 Answer

Red spot when screen is dark

You need a light engin. Visit

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