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You may try unplugging the set for about 10 seconds and trying again to see if it resets itself. If that doesn't work, you could be lucky and just have a blown fuse inside the set. Do not put in a higher amperage fuse than what it calls for though, and if the new one blows don't try another. IF the fuses are good, then you probably have a problem in the power supply and if the set is less than 6 years old, it may be worth repairing.