help repairing my 20in symphonic lcd tv

Hi I have a 20in lcd symphonic tv that just STOPPED working three days ago up until then it had NEVER EVER given one moments trouble. It was MFD In 2006 purchased at wal mart do you have a repair manual for this tv? model 20FWL6 I feel it is the mainboard since I have no pic or sound at all nothing it's just like it is unplugged I have tried it in several outlets that I( know work it is just down for the count. however im not one to give up easily I will take something apart just for the benefir of the doubt I don't mind geting my hands dirty. I have saved countless $$$$$ over the yrs when it turned out to be either a frayed cord or blown fuse please tell me you can help me I have contacted so many people over the past couple of days and they seem to either not want to help or just don't know what the heck they are doing..I can't just run out and buy a new tv when one breaks down im a true American with a real family we have to eat and pay bills we don't just rely on tv but however when the day is done it is really nice to be able to turn it on and relax..you get where im come from I hope..I'll be looken for your reply...Thanks WADE Johnson Eastman GEORGIA...

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