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Check on the site www.tvrepairkits.com for your model. I believe its one of the oines that has a known shinking screen issue...when that issue surfaces one of the other possible symptoms is the TV will just shut down.
Tv have a problems known as a convergence problems,it is dead.The tv convergence board it is dead,that why ur tv picture are R,G,B colors lines mis alignments,have colors shadows picture or 3D picture lood alike?The tv convergence board require changes 2 STK convergence ICS and some or all of it resistors too.To fixed the tv convergence board to solved the tv convergence picture problems.The shop will cost u like $300-350 for parts and labors.
Samsung's digital light projection (DLP) televisions use a spinning color wheel to create the colors that are seen on the screen. If the color wheel becomes misaligned during use, it will become damaged and have to be replaced. Replacing the color wheel on a Samsung DLP television can be done at home, once a compatible-sized color wheel has been bought from a TV supply store.Replacing the color wheel yourself will void any Samsung warranty that might be in place, but is the only solution for getting the TV working again in as short a time as possible.
Put on the anti-static grounding strap to keep static electricity from damaging the internal components of the Samsung DLP TV. Turn the Samsung around so that the back is facing you. Make sure the Samsung is unplugged from the AC socket.
2 Use the Phillips screwdriver to remove all of the screws from the back panel. Put the screws aside. Pull off the back panel.
3 Loosen the two screws from each side of the projection bulb's case. Pull the projection bulb out. Put the projection bulb aside. Use the Phillips screwdriver to remove the two screws from the left side panel. Pull the side panel and the circuit board attached to it out carefully and put it down so that the cables attached to it have not been pulled out.
4 Take a picture of the power cable's position with the digital camera so that you can put it back correctly later. Pull the power cable out from inside of the Samsung's case so that the center panel is free to be pulled out. Remove the two large headed screws from the center panel with the Phillips screwdriver. Remove the top two screws holding the panel to the plastic case using the Phillips screwdriver.
5 Slowly slide the center unit out a few inches. Take a picture of the projector lens' positioning with the digital camera so that you can put it back correctly later. Unplug the two cables from the left side of the center panel. Unscrew the sensor switch using the Phillips screwdriver. Slide the center panel completely out of the Samsung and put it down on the clean cloth. Blow off the color wheel assembly with the compressed air.
6 Use the tweezers to remove the green plug from the top of the color wheel cover. Use the tweezers to remove the two cables at the side that are coming from the color wheel. Use the Phillips jeweler's screwdriver to remove the screws from the top, front and back of the color wheel cover. Slide the color wheel cover straight up to expose the color wheel.
7 Use the Phillips screwdriver to remove the three screws holding the color wheel to the color wheel assembly. Lift the color wheel up and out of the color wheel assembly and discard it.
8 Position the replacement color wheel in the color wheel assembly. Reassemble the color wheel and reassemble the color wheel assembly. Put the color wheel assembly back into position in the rear of the Samsung DLP TV. Reassemble the Samsung DLP TV. Plug the Samsung DLP TV back in for power. Turn the Samsung on and enjoy seeing the colors displayed properly again now that you have replaced the color wheel.
You have a high voltage leak, one of the three crt's are arching to the metal chassis, this will cause momentary high voltage loss so your picture will fade until the voltage builds back up again.
Repairing this is hazardous because the voltage in the crt's are around 30,000 volts even with the tv unplugged. I don't suggest doing this yourself.
A technician will do the following he will attempt to stop the leak with specially formulated silicone compounds, If this fails the only alternative is to replace the picture tube that is defective.
The cost of repair depends on if the tube will have to be replaced, the initial repair using silicone should not run more than the standard service call rate for the company servicing the unit. If it is picture tube the cost could be upwards of $400.00
Steve, I would say that the problem is with the Direct box, simplest way to verify that would be to disconnect the box from your set & hook-up a DVD player to the tv and run it, if the picture is normal, probably the box. That test does not rule out the tuner in the tv but is a start. Have you tried re-booting the box by removing the AC cord from the box for 30 seconds and then plugging it back in ? Be advised it may take as long as 5 minutes for the box to boot back up once you plug it back in, try these things and let me know results, BMW Rider