Numerous white spots on Smasung DLP TV

That usually indicates that the optical block is going bad. That repair is usually 900-1100 dollar fix.

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.

Sound like dead pixels - cannot be fixed, hopefully you have a warranty?

Your projection lenses need to be clean including the lamp. Call the service technician in order to fix the problem.

Are they spots or dots? If they are spots then the optics are contaminates. If they are dots either white or black then you have a bad DMD chip. The cost of repair depends on who you hire to repair the set or if you do it yourself it depands who you purcahse the part from.

Mine is having the same problem. It started around Memorial Day and is only getting worse. One white dot is now a dozen. I called Samsung several times and was given the brush off. They clearly know this is a problem and are failing to respond to the problem in hopes that people will deal with it on their own. It does not matter if your warranty is expired. This is a latent product defect. They are still liable and obligated to fix the problem. I have filed a complaint with the better business bureau. If the company does not respond, I'm taking this to small claims court to get reimbursed for any cost to fix my tv.

If your Mitsubishi TV has white spots in the picture , you can call Mitsubishi @ 1-800-332-2119 and request a free DLP Chip to fix the problem. They will send the New DLP Chip at no charge to a TV Tech in your area to install it for $200 flat rate. That is about a $250 savings if you had to pay for the chip . Call them with your TV's Model number and serial number and let them know when and where you bought the TV.
It saved me some hard earned money and now my TV is like New !

same problem for me ... check out this thread on AVSforums about it.

I have the same exact tv as you and had the same problem. I took it to a repair shop who told me I needed a new DMD chip and that it would be 850 to fix. I used the information in thread above to get the part number and bought the chip on ebay for under 200. Here is a link to the listing CHIP

People have had good success. I will be replacing mine tomorrow.

BAD LIGHT ENGINE call UED 1-800-648-6657

See link below for "field of stars" fix:

http://www.avsforum.com/avs-vb/showthread.php?t=1107926

Worked a charm on my 50" Samsung DLP. Read thread carefully as there are 2 different version of the DMD chip you will need to replace. I ended up fixing mine for less than $165!

Chuck