This problem could be a bad DM board. If you are handy or knows anyone who is, and they can solder, I have an instructional file that will show you how to take out the DM board, find the bad parts, and even give you a source where to get the parts. There are even pictures included! Now once you get this apart, and the capacitors look good, check the capacitors, or have them checked. I have seen in a few cases where some folks have only replaced the capacitors that looked bad. If this does not fix your problem, you will need to have a pro come out and check out your TV set.. If you do not have a clue what you are doing, please play it safe and call in a tech. If this board is indeed bad, the repair should not eceed 1000 bucks. If you want this file, leave an e-mail address and i will forwar it to you. Remember, there is a possibility that there is another problem with your TV set, but this has fixed over 65% of the peoples TV sets that I have shared this file with. Good Luck, and let us know if this helps you.
"Those who do not know their opponent's arguments, do not completely understand their own".**For complete TV repair kits including parts goto www.TvRepairKits.com