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There are 3 things that generally cause the fuse to blow in a solid state TV set. The first thing is the diodes that make up the bridge rectifier that rectifies the incoming AC voltage. There could be four seperate diodes; or, it could be a bridge rectifier module. Checking these diodes with a DMM or VOM should give you a reading (using the Rx1 scale on a VOM or the diode test function on a DMM) in one direction and an open when you reverse the probes. If you get a reading both ways, the diode is shorted.
The next thing is the voltage regulator or other semiconductor devices in the PS. This regulator may consist of an IC or several individual components.
The third thing is the horizontal output transistor. HOT's usually don't short on their own and they usually short due to either a bad flyback transformer, bad caps in the power supply and/or horizontal drive circuits, or cold solder joints in the horizontal driver/output stage.
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