The picture went green. I was able to replace the DMD board with a used one and the picture returned just fine. Shortly after, the sound began giving problems. At first is would have no sound when you first turned the set on, the after a litte time, the sound would begin to work spotty at first then it would be ok until you turned the set off. Now the only sound the tv speakers make is a clicking sound. It makes this sound anytime the set is on. We listen to the tv through a separate stereo receiver and speaker. Any suggestions are appreciated. Thank you,
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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. Here's a video that will help you find where the DMd chip is located : http://www.youtube.com/watch?v=0jr_9A5Xd2Q Have a blessed one!
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.You will need to replace the DMD board. Have a blessed one!
This could be an issue with your DMD board or your Video Board.
Go to the menu, if the white spots show on the menu, the issue is with your DMD board, but if they don't show, the issue is with your Video board.
When you replace the color wheel on certain models you must remove a jumper plug on the DMD board. There is a service bulletin that is usually included with factory replacement color wheels. If the color wheel has a whine to it that means it is probably used and came out of someone else's set. Anyhow the plug can be accessed as I recall without removing the shield of the DMD board. I know this because my first one of those gave me grief, too. Samsung changed wheels on different versions of the same model tv so it gets confusing. You should be ok though after adding/removing the two pin plastic jumper from the DMD board. The only other thing I saw cause a green picture eas the plug that goes from the DMD to the digital board can develop bad connections and can be replaced with a regular DVI type cable. Hope this helps, Russmann.
I suggest unplugging your entire system for one minute to try a reset again. Sometimes a system reset doesn't take the first time. If this does no good you probably have damage to your digital board or dmd board. I have a smaller version of the same set at home and have done samsung's warranty service for several years. They deliver a great picture but do need regular maintenance and or repairs. The upside of all this is if you have homeowners insurance it may be covered, depending on your deductable amount. However, a dmd board can cost 500.00 so you may have to go that route. Hope this helps, Russmann.
I had black vertical Lines. Sometimes across the entire image, sometimes partial. Came and went. Seems a dead-ringer for cold solder joints on the BGA of the DLP IC.
So i threw down $15 and bought the service manual online, pulled out the entire light engine assembly, and blew everything out, vacuumed etc.
I then tightened the heat sink on the DMD (supporting the DLP chip). Made the problem consistent (black lines) always. So then I slightly loosened the spring clamp screws - black lines went away.. Obviously this varies from each device, where the cold solder joint(s) are etc, But this will keep the Mrs happy until I work up the courage to reflow oven the DMD board, or get a new one. Anyone reflow oven their DMD boards yet?
there are several things that need to take place for the lamp to turn on. first the color wheel needs to turn on ( if you can hear a whinning noise then this is fine) next the tv will send a signal to the lamp ballast to turn on, and the ballast needs the 130v dc supply from the power board ( simoly remove the lamp and reinstall the lamp door, turn tv on, and if you hear an arcing noise from the ballast you know this is fine too. the board that controls all of this is the dmd board. so if the color wheel works, ballast starts then i would replace the dmd board....