My tv power does not come on. My tv fuse blows out the moment i turned the power swich on .i have

Question

My tv fuse blows out the moment i turned the power swich on .i have tried to replace the defective fuse two times using new fuse from the market.The old fuse size is 3.15 and i used the same fuse size for the replacement but the problem still persists.What do you think is the probable cause?