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If you hear the color wheel and then see the lamp actually light up you most likely have a bad DMD board. The part number is either BP96-00678B or BP96-00678D it depends on the chassis you have in your TV. The parts are available through http://www.samsungparts.com
You have two options only. One is to pay a trained Samsung tech to replace the DMD bd which takes a Tech to properly align the DMD bd and takes some time or you can replace the entire Engine which is more expensive but quicker and easier. Wish had good news for you.
It sure does sound like it. Normally I replace the entire light engine at the same time because as you know this is a problem with DLP's.The replacements come complete, DMD - Color Wheel, the whole nine yards, makes the job easier. Good Luck..
Color wheels in that unit were updated to remedy a flaw in their initial manufacturing. I suspect you have one of the updated wheels and now the dmd board is having a problem distinquishing relative speed etc. Pull dmd jumper to fix it. Remove the jumper pin on the dmd board, metal shield has a cut-out so you can just reach in and grab it with a pair of needle nose pliers and pull it out.
William Rayburn, CET
PO Box 442
Long Beach, WA. 98631
I had a bad digital board also. I went to parts.com to order a new part way cheaper than from repair service. the only problem I had was that after installation which is super easy 4 cables to unplug and replug. when I turned on the TV the picture came in upside down, not good. no one would give me the code to flip the screen as it is in a hidden menu, well after months of searching the web I found it!! It works for most all newer Samsung TV's. turn the TV off, hit mute then 182 and then power on button on the remote. the "hidden" menu will pop up and you scrool down to h-flip and flip the screen. I don't recommend messing with any of the other setting as you could likely really jack up the TV but at least you can fix it for a 3rd of the cost you would spend otherwise.
This will have to be narrowed down to a specific problem. I would try the easiest things first. First check the lamp. Is it bad or just starting to go bad or does it just need to be reseated with the ballast? If the ballast flickers when turning on your TV, then you will know it is the lamp that is not working or the ballast may need to be replaced. If that is not the problem next check to see if the color wheel is spinning or broken. If broken, it will need to be replaced. If not spinning it is the DMD board that is bad. The color wheel is plugged into the DMD board. If the DMD board is good it will spin the color wheel, that is what will start your lamp. When you lamp starts, you have your picture.