You have a very heavy short circuit probably in the power supply part of the tv. if fauult occured in any other part of the tv it would normally close the power supply down without blowing the mains fuse ending up with just a dead set or the tv not coming out of standby. As for repair there are too many components which can go short circuit and it will take a tv technician with fault finding equipment and circuit diagram to repair. Not a diy job unfortunately.
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