If you Google the brand of TV you have and problems your having you will more than likely find out that many others have had the same issues. YouTube is your friend. Don't be afraid to work on it yourself. The worst thing you can do at this point is fix it right?
I had the same problem. Fixed it myself for less than $20. I had to replace two capacitors. Wasn't difficult at all. I recommend going to YouTube and watch some videos about it as well.