Check your advanced video settings for something like Environmental LIghting. There's a sensor on your television that reads the light in the room. It can adjust the brightness of your screen to accommodate more or less light. If you turn this off, it will help. You can also request support directly from your television. They will ask you a couple of questions, then setup a time to call you where they are very helpful and will walk you through any problems you are having. If it can't be fixed over the phone by tech support, they will setup an appointment for you to have it repaired. Hope this helps.
SOURCE: thomson 50DSZ645
There is only one brightness bulb for your tv. You have the main bulbs which run the color for the Tv and then you have another bulb which runs the brighness. Typically it is a flourecent bulb inside which does need replacement now and then. Check tje specks on the tv's web site and you should be able to get the model number of the bulb from them and you should be able to purchase it from a repair shop or from online
SOURCE: Samsung Plasma TV have sound but no picture
G'Day!
Unfortunately, what you're describing is a repair
issue. You won't be able to address the problem with troubleshooting.
There is a part inside the TV that needs to be replaced. If you're
under warranty, this will cost you nothing. If you're not under
warranty the cost will likely be a minimum of $200 parts and labor.
However, be warned that the cost could be considerably higher.
I hope I've provided you useful assistance and that this information
allows you to make an informed decision as to how to proceed from
here. Please be sure to vote on my response. I hope I've earned a
good rating from you today.
Please post a comment if you need
additional assistance so that I can help you further
SOURCE: DLP TV starts to loose picture after 1 - 1/2 hours of use
I can tell you this...I am not a tech but do have some knowledge through trial and error. I have a Toshiba 50HM67 DLP TV and my screen was flickering real bad and the picture was horrible (orange and purple blotches everywhere on screen. The yellow lamp light continued to flash so I purchased a new bulb which helped for the first initial hour or two after installing. The TV began to flicker even worse and even on bright lamp the issues returned. I then decided that I would open her up and do a deep clean of all lenses and ballast components. Wearing latex gloves (to prevent oils on your hand from getting onto components) ad taking pictures s I disassembled the light engine, I got to the color wheel only to find that it was beyond filthy. Note that I purchased this TV in 2007 and here it is 2014. Need less to say, I used some rubbing alcohol, Q-tips, dust off, vacuum, and a clean static-free cloth and now the picture looks like the day I got it. Even after installing the new lamp the yellow light kept flashing. After cleaning everything off and out, no more flashing yellow and no issues what so ever. Just be careful when removing the color wheel as mine what about as big as a half dollar. Hope this helps and feel free to send me a question anytime!
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