When I turn on my Samsung LCD TV, the volume above the maximum?

I have Samsung LCD TV(don't know the type but if you need it I can find it). I bought it about 2.5-3 years ago(I don't know exactly). Recently, I've encountered a problem. Sometimes when I turn on TV, the volume is 136 although the max volume is 100. I don't why this happens. Can this be repaired? What is happening with the TV? I'm not sure if the warranty period has expired but I think it has. I hope someone will help me
 
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