Blue Line acroos bottom - 55' Wega rear projection TV

i have the same problem but mine has a blue line surrounding the screen the tech took out the fly wheel part from inside this part has the 3 main colors with strips the blue side strip if you look at the glass it has the problem you see on your screen you have to replace that one section

The "optical block" is bad. There are currently 3 settled class actions against sony for other models with the same problem, If memory serves me correct, your model is in an ongoing class action. If you google Sony LCD class action suit. you will find lots of info. www,sonystyle.com and support has a few articles as well. It is a 900.00 part, so, not really cost effective to repair. Post a comment for me tomorrow and I will paste what links I have on this issue to this post. There in my other PC at my office. Hope this helps

Replace the light engine Encompass Parts Distribution will have price of part 1-800-638-3328

Check out the Sony Websites. They extended warranties on their Rear Projection TV's. I came across this website
http://sites.google.com/site/sonylcdrptvproblems/sonyrearprojectionlcdtv-opticalblock#TOC-Summary-of-Sony-warranty-extensions
If you bought your TV in Canada, check out their e-support website/news bulletin

Are you using a cable or sat box. If so then you are selecting channel using the tuner in the box and sending a constant signal to the TV eithir on one channel of the tv tuner or one of the other input of the tv. If this is the case I would suspect the box and not the tv because you say it is only on some channels.. If you are using the tuner in the tv with cable or antenna directly in I would say the main board that has the tuner on it needs replaced. Without a specific model number thats the best I can do. Hope this helps.

Take to TV repair shop. contact Sony get RMA first for warrenty work! so free work gets done!

if you have a Sony LCD projection ..Theres good chance optical block needs replacing .This spot will get bigger and will eventually cover most of screen the longer you use it .needs repair.If there is no warranty on this unit..I would estimate repair around 6- 8 hundred dollars ..

That's OK, I been provided you technical info about TV problem.

you will probably need a blue picture tube

This is an optical engine problem - it needs to be replaced - it will only get worse. Sony has had problems with the optical block and is extending the warranty for this problem. (this is a LCD projection tv - there is no convergence)