I bought my DLP (HLP6163W) in 2003 (it is out of warranty now) and I got the dreaded three flashing lights and so bought a new lamp and set that up and everything was working fine for about 15 days and then two days ago while watching cable the screen turned blank (black).
The TV is on (like watching a dark room with very little light in a movie) as I can see a glow throughout the screen so I presume that the lamp is still working, there are no lights (led's) flashing or on in the front on the TV, I can also hear the fans working so I am not sure what's going on.
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Does the menu come up?
If it does, then, the source could be the problem, such as the cable or DVD player. If the source is not the issue, then, the problem would be in the Digital or Analog PCBs.
If the menu does not come on, then, the problem is more than likely the DMD.
If it is not the source then call a local authorized Samsung servicer in your area. Contact 1-800-Samsung.
Hope this helps.
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I had the same problem. I bought my tv at Best Buy and my warranty included a new bulb for the lamp. They only last about 2 yrs or so depending on how much you watch the tv. You can also buy replacement bulbs online that don't cost too much. BUT, you will need to replace every couple of years. The things you listed are exactly what happens when the bulb goes out. Hope this helps!
Is it an LCD or DLP? The Model below suggests it is an DLP. Sounds as if you have the dreaded light tunnel collapse common to all LG DLP TV's. Inside the light engine there is a square tube made up of four mirrors. These mirrors deform and crack with the heat of the lamp. They fall down over the light aperture and cause a shadow of varying degrees. It is fixable now at a realistic price ( used to have to replace engine) as LG have made the parts available. It would take a competent tech around three hours to complete or if you are technically minded you could do it yourself. I hope this helps. Good Luck.