If you are competent with electrical equipment, remove the back of the tv and check the power supply pcb (board connected to the mains lead). Check the capacitors, making sure that they all have flat tops, and are not bulging. If they are, replace them. Here is a picture of a couple of faulty capacitors to show you waht they shouldnt look like.
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If you are competent with electrical equipment, remove the back of the tv and check the power supply pcb (board connected to the mains lead). Check the capacitors, making sure that they all have flat tops, and are not bulging. If they are, replace them. Here is a picture of a couple of faulty capacitors to show you waht they shouldnt look like.