Every time you put in that fuse and it sparks your probably causing more circuit damage as a fuse very very rarly goes bad for no reason.. Ok to the subject at hand. it you put back in a good fuse WITHOUT PLUGGING IN!! Next measure with an olm meter across the two legs on the plug on the end of the wire(the part you normally plug in.) Is there a short circuit?? yes? I would then start trouble shooting the front end of your main power supply like bridge recifyers,main b+ capacitor, the capacitor that goes across the ac line input as well as an VDR can short out in a surge. Now if that dosent get you anywhere your gonna need a schematic diagram. You can get that from howard sams photo facts. It available on line as a PDF for about 27.50. If you dont know what Im saying here then I really cant help you any farther and you will need to take the set to a quilified repair person as a tv even unplugged can hold 100's of volts. Now if you do know what your doing with solid state repairs by all means get the schematic and post it here for us to look at and we can assist you with this repair. Good Luck
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