Thank you for that information.
This could be one of two things but both require service unfortunately.
This could be the power supply board or the back light but I suspect the power supply board as the fault on this one.
Its something you could replace your self with my assistance if you are handy and have some basic hand tools.
Let me know on that?
I can tell you the best place to get that board I will talk you though this its pretty easy to do.
But if not, you will need to have the TV serviced, Best Buy is very good with this, they send it out for the repair at a good price and they do very high quality repairs.
Or you can check for a small local home audio Video shop, as most of them now perform repairs either at your home or the shop.
I wish I had better news for you, I really do.
In any case, I will stick with you until this is complete,
Please rate kindly thus far, it won't cost you anything to rate my service to you kindly,
Then you can reach me by simply replying to this message anytime.
There is no cost to rate ;-)
Thank you and have a nice day!
Once you rate, I will see that, and put your question in my priority list so when you reply I will get that and continue even though the site shows that it will close the question. It doesn't actually stop out communications until we are through and the job is complete;-)