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.
-What is the model number for the television? (this can be found on the back of the unit) -How old is the unit?
i am at work and i don't have this information
yes it is an LCD and it was purchased in spring 2008
This is a very common problem with your tv, what has most likely happened (about 90% of the time) is the power supply has failed, more specifically there are a few caps in the power supply that have most likely failed. The unit will require component replacement to get it working again. Do you have any electronic repair experience, test equipment, and soldering equipment? If so I can assist you with this repair. If you do not have the above equipment and skills a repairman will be required for this repair, you can expect the bill to be around $200.
Also to let you know, I have had a ton of customers in the last few weeks call samsung to complain of this issue and end up getting their sets repaired for free, so I would call samsung first if I were you and see if they will repair yours as well.
I am sorry that I don't have a magic button or a quick fix for you on this one, but component replacement will be required.
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