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If the set is powered up, you can try resetting it to factory defaults. Yes, any of these suggestions may not work but one of them might fix your problem. You might try searching for tips by including the model number in the search. Bear in mind you are dealing with a high voltage device and your next repair may be at the hospital if you are not exceptionally careful.
This is a frustrating problem, but more details are required to solve it. Have you found the power switch on the TV? Are the batteries installed properly (facing the right way) in the remote? Is the TV connected to a working power circuit? If power is getting to the TV and the power switch doesn't work, I'd return the TV.
If the red light won't come on it is not getting power.First,try plugging it in to a different outlet,or unplug one of the gadgets you know is working and plug the tv in there.You are simply switching.If you know that there is power coming from the outlet and it still won't come on then you'll have to check the cord;don't go much farther than that without expert help.
Unplug,replug the tv back like 24 hrs later.That the whole tv is resetting itself everythings.Tv now should be working again.If still have the same problems,than ur tv DM power supply board is have dying parts,must repair the tv DM power supply board to fix the tv.