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Forget the previous solution. There is no optical block in an LCD tv. The problem you have is due to a faulty t-con board also known as the LCD driver board. It is relatively inexpensive and easy to replace and I can guide you with the repair if you want to do it yourself.
This blue dots problem is due to defective blue lcd and related uv filters/ polarizers in optic block (light engine) and optic block will be replace to fis that issue. It would be costly fix and an experienced tech is needed to do the job. You can expect $1000 repair cost. Thanks.
This is caused by a failure of the optical block of your TV. The only way to fix the issue is to replace the whole optical block which is very expensive ($1000+) and time consuming (need to take whole TV apart to replace the part).
The optical block in your model had inherent issues and there is currently a class action lawsuit pending against Sony for this issue. Up to date information reguarding the lawsuit can be found here: http://www.sonya20tvclassaction.com/main/home.sfx
The issue is caused by the optical block. It was an inherent issue in the TV and cannot be fixed without replacing the optical block. It usually costs about $1000 for parts and labor. It is impossible to fix without the part as it is an inherent irreversible issue.
The TV starts to have problems with the optical block after a certain number of hours, you did not have this problem until much later because of limited use.
Sony did extend the warranty for the optical block parts and labor but it expired on 6/30/08. The only option you really have is to keep contacting Sony, explain to them your situation and they might cave in to paying for part of the repair due to special circumstances.
Bad news: The issue can only be solved by replacing the optical block for the TV. This was a defect in the design of this TV. Replacing this part is very expensive (over $1000) and time consuming (need to take whole TV apart).
Good news: Sony extended the warranty for the optical block for this model. They are covering the cost of parts and labor for this TV. Contact Sony to have them refer you to a authorized service center near you.
6 blinks mean a thermal fuse problem. This model had a problem with the thermal fuse that does not close once it is opened. This is caused by a blockage of the fan that cools the optical block, usually from accumulated household dust. This causes the TV to overheat. The thermal fuse detects this and puts the TV into protect to prevent further damage to the TV. To fix, the fans need to be cleaned and the thermal fuse needs to be replaced. The parts are not very expensive (around 20 dollars for the fuse) but it does usually takes a while to fix because the unit needs to be taken apart to have access to the fuse and optical block fan. The GT board might have been damaged for the excessive heat but most likely a new thermal fuse will fix the issue and clean fans will prevent it from happening from the future.
If the set is hooked up using Component cables (red, green, blue), then check to make sure the cables are hooked up correctly, and not defective (change them out). If the color problem remains, then the problem may be in the Optics block of the television (which is not unheard of in this unit).
If the menu of the TV displays blotchy discoloration, and the discoloring is the same for every input on the tv (stationary), then it is the Optics, and the optics need to be changed. It is not the easiest job in the world, and the block itself is quite expensive, although the unit my be under an extended warranty from Sony. Contact them directly to see if you can get any help (cost or service-wise). Hope this helps...
your issue is more than likely in the optical assy but make sure its not the lvds cable. when technicians remove the optical assy alot of times they will forget to remove the lvds cable and it ggets damaged.