NotTaR of Television Sets : Shorted Components                      
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Shorted Components

A failure of the horizontal output transistor or power supply switchmode transistor will blow a fuse or fusable resistor.

Look for blown fuses and test for open fusable resistors in the power circuits. If you find one, then test the HOT and/or switchmode transistor for shorts.

Other possibilities: rectifier diodes or main filter capacitor.

While you are at it, check for bad connections - prod the circuit board with an insulated stick when the problem reoccurs - as these can cause parts to fail.