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normally white spots are whithin the screen. it is also called "panel". it is the most costly part in the tv. but one need to inspect the tv first before making sure it need to be replace. try to disconnect all cables inside the tv by opening the back cover & fix them again.
I SUGGEST CLEANING THE LENS ASSEMBLY. IF YOU LOOK ON THE SIDE OF THE TV CABINET YOU WILL A SMALL SQUARE THAT IS ABOUT 4 INCHES BY 6 INCHES HELD IN WITH ONE SCREW IF YOU LOOSEN THAT SCREW YOU WILL BE ABLE TO GET INTO THE CABINET OF THE TV AND CLEAN THE LENS GOOD LUCK
<span id="ctl00_ctl00_MainColumn_CenterColumn_ThreadSolutions1_Repeater1_ctl00_lblSolution">DLP/mirror chip is going bad. A common problem on Sammy TVs after 2-3 years. Chip is user replaceable (try samsungparts.com or ebay) for about $150-200. Sammy was (last year) repairing the DLP White Spot problem for free. You MUST talk to ECR (executive customer service) to even think about getting that consideration--forget the standard CS people. Don't know if they are still covering this out of warranty in 2010.</span>
What is the make and model of TV. If it is a Panasonic that has different colored spots such as pink, blue etc. Then you need t6o contact Panasonic as this is a memory reset that they have to perform on the LCD driver board. Other brands of LCD projection sets that have spots that appear all over the screen mostly on white back rounds are almost always dust that has settled on the LCD panels. This requires a technician to clean the LCD panels if possible.
If these spots are small, they are likely the visual effect of a failing DLP chip. When some of the tiny mirrored surfaces on the chip stop moving, this is the result. This is not something you can fix yourself. A Samsung authorized service center will charge $400-$500 to replace it for you.
ok u could have somthing on the lcd srenn and thta is y u have a yellow spot what i would do first is pull out the unit and look at the luc screen and buld to see if u have somthing on it i could be a small pice of papaer or anything it is best if u look at it thru the lens on the inside on the tv when u have it on because u can see i t better i hope this hps marty
this is a touchy subject for sony. basically sony has increased the brightness levels for the backlights to have better color tones in thier lcd's. well the downfall of this is the white spots you are experiencing. this is not a defect, you will never get them to go away, the only thing you can do is to turn the backlight and brightness down to reduce the white spots. if you contact sony, there is a software upgrade that will help reduce this issue...