Thank you for posting your question on Just Answer! I will be happy to help you with this problem. Can you please give us some more information so I can better answer your questions.
-How old is the unit?
- Do you have this problem while watching all different devices hooked to this television? (DVD player, cable, satellite, game counsel, ect.)
Please give me this information and I will be happy to assist you further.
Also, how thick is the line?
The TV is eighteen months old.
It appears with all devices.
The line is one or two pixels wide.
I am very afraid I have no good news for you.
What you have is a LCD panel that has failed, this is a very common problem with these new LCD televisions and there is no way to fix it. The part price is always more than a new television. For example the part needed to fix your set is over $1600, you can buy a new set for half that price. Unfortunately there are a lot of good folks in your position, they have bought these nice sets, and after 18 months the tv is going into the garbage unless they bought an extended warranty on it.
The only bit of advice I can give you if you don't have a warranty is to call Toshiba and complain to them, a lot of manufactures are working with their customers because these sets are failing so prematurely. A lot of times the manufacture will repair the set, or supply the part at no cost, leaving you with the labor for installation.
I am sorry I have no good news for you, please let me know if there is anything else I can do for you.
If you would like any additional information or have more questions please don't hesitate to ask!
Please never accept an answer until you are 100% satisfied and feel you can leave positive feedback. If I have answered your questions and met your needs then please press the green "accept" button. Otherwise please feel free to ask anything else to get your problem resolved. Positive feedback is always appreciated! Thank you,Tim Nolan