Sir hamari tv ka name thonson hai na hi light

Hello
As sound and picture are absent. your TV is in dead condition we can say.
That is there is no power gets inside your tv. All modern TVs have built in SMPS stabilisers. A sudden overvoltage, lightning etc can make harm to power supply system. We cannot predict the exact point of fault at this time. It is best for you to contact a service personal nearby. Sometimes a fuse inside may have blown up. Never try to repair it by yoursef, since orginal spare parts of Thomsun 24"TV is very difficult to get in India.