As there are 2 completely different circuits for sound and picture in a tv set it is possible that the picture board has been damaged by the power surge . it could be as simple as a blown fuse for that board or you may have to take it to a repair shop for a proper diagnosis and a quote
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As there are 2 completely different circuits for sound and picture in a tv set it is possible that the picture board has been damaged by the power surge . it could be as simple as a blown fuse for that board or you may have to take it to a repair shop for a proper diagnosis and a quote