Question about Sony KDF-E42A10 42 in. LCD Television

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Some discolorations or wrong colors probably dust on the LCD's inside the light engine. Can this be cleaned?

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You have a defective light engine which is causing the colored spots to appear and the issue will only get worse in time. The part number is A-1123-071-A and runs around $580 dollars and you MUST return the core back or they will add $1300.00 in core fees. For $799 tigerdirect.com has a 60 inch Mitsubishi 1080p DLP for $799

Posted on Sep 02, 2010

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Posted on Jan 02, 2017

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Discolored Sides


Hi,Yes your problem sounds like the DMD board.This is how it works: http://electronics.howstuffworks.com/dlp1.htm Basically the light of the lamp goes through a tunnel that carries a color wheel(rotating disc with a gamma of colors that creates the colors on your tv)then the light of the lamp goes through the DMD board which is a chip composed of around 2 million pixels that creates the images and colors.When it starts to fail it will create black bars,pixelation,color distortion or white dots on screens.Ths if your tv is a dlp if its a Lcd it will be an issue with your light engine: Here's how your tv works: http://www.youtube.com/watch?v=ZLLHnQ4y-wo Basically there's 3 LCD chips that create the colors and image by blending together.When these chips start to melt you will get those blue spots, pixilation even vertical lines.You will need to replace the light engine. Have a blessed one!

Mar 29, 2010 | Televison & Video

2 Answers

Yellow/green blotch appears in light areas


Hi,If there's any discoloration,pixilation or hues on the tv it will be an issue w the light engine's 3 lcd chips.This link explains how the lcd technology works: http://www.youtube.com/watch?v=ZLLHnQ4y-wo Basically there's 3 LCD chips that create the colors and picture by blending together all when the light of the lamp goes through them.When they start to melt they will start to show the symptoms.You will need to replace the 3 lcd chips or replace the light engine.Good luck and God bless your house!

Feb 10, 2010 | Sony KDS-R60XBR1 60" Projection HDTV

1 Answer

Have Mits HDTV have horizontal lines running across screen, whats the problem? After it warms up, seems to lessen but does not go away.


Hi if its a Dlp it will be an issue with the dmd This is how the dmd works: http://electronics.howstuffworks.com/dlp1.htm Basically the dmd is a chip that carries 2 million pixels that create the image and colors .When its bad it will cause pixilation,color discoloration or stripes.If its an Lcd it seems you are experimenting a light engine problem.This is how your tv works: http://www.youtube.com/watch?v=ZLLHnQ4y-wo So basically the 3 Lcd chips that create the colors and image is going bad and thats why you get that color discoloration.Contact Mitsu or look for your light engine online.God bless you and your house!

Dec 09, 2009 | Televison & Video

1 Answer

Picture forming concentric rings of colours - green, surrounded by blue, then red halo. What is the cause and what do I need to do about it? Thanks


If its a Dlp . Hi,its sounds like an issue with the dmd.This is how the dmd works: http://electronics.howstuffworks.com/dlp1.htm Basically the dmd is a chip that carries 2 million pixels that create the image and colors .When its bad it will cause pixilation,color discoloration or stripes.God bless you! Ifa Lcd.it seems you are experimenting a light engine problem.This is how your tv works: http://www.youtube.com/watch?v=ZLLHnQ4y-wo So basically the 3 Lcd chips that create the colors and image is going bad and thats why you get that color discoloration.Contact the maker or look for your light engine online.

Nov 18, 2009 | Televison & Video

1 Answer

Blue spots on sony 65' hdtv


For sony sets with color discoloration: Hi,it seems you are experimenting a light engine problem.This is how your tv works: http://www.youtube.com/watch?v=ZLLHnQ4y-wo So basically the 3 Lcd chips that create the colors and image is going bad and thats why you get that color discoloration.Contact Sony or look for your light engine online.God bless you and your house!

Nov 17, 2009 | Sony Grand WEGA KDF-60XS955 60" Rear...

1 Answer

KDF-E60A20 LCD rear Pro HDTV The screen is discolored with a yellowish tint, it looks like it's bleeding down to the bottom, any thoughts?


Your light engine is shot. The coloration is from the the polorised film over the LCD panels being over heated due to inproper ventalation. Due to dust on the vents/and smoking in the home. it clogs the internal filters,and reduces air flow for cooling. Basicly buy a new one,too costly to repair. Part # A-1132-204-A
cost...$949.99 + $1100.00 core. It will also start turning blue around the edges ok the tv. Or turn green. Sorry for the bad news. Todd toddthetvmd@yahoo.com

Oct 31, 2009 | Sony Grand WEGA KDF-60WF655 60" Rear...

1 Answer

LCD projector spots showing up on the screen


there are light filters behind each lcd panel that determine the color of light going through it. because of excessive heat and dust, the filter tends to burn and cause discoloration in the image. if the image is bluish (cyan), the red filter is burning. if it's yellow, the blue is burning. if it's purplish (magenta), the green is burning. the filters will need to be replaced. unfortunately, many companies don't sell individual parts of the optical engine, so the entire engine might need to be replaced.

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1 Answer

Hitachi lcd projection tv screen discoloration model 50vs69a


probabally a dust spot on the mirror or the lcd mini panels inside the optical engine.
must be dissembeled to clean.
not for the faint of heart.

Jun 13, 2009 | Hitachi 50VS69 50" Projection HDTV

2 Answers

Loud huming noise and vibrations from infocus x2 unit.


the berings on the colorwheel are failing. i suggest replacing it. also, the discoloration is baked-on dust. the wheel can be cleaned, but it's no recomended, due to the finish on the glass and the fact that the heat has probably weakened the glue holding the glass on the wheel. it's the same glue holding the light tunnel together, and it's collapse is probably causing the faint image. the parts aren't all that expensive, but you can only get them through an infocus authorized service center. check the website for one.

Apr 30, 2009 | InFocus SP-LAMP-018 Projector Lamp for X2,...

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