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NotTaR of Television Sets : Shorted Components
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1994-2007, Samuel M. Goldwasser. All Rights Reserved. Reproduction of this document in whole or in part is permitted if both of the following conditions are satisfied: 1. This notice is included in its entirety at the beginning. 2. There is no charge except to cover the costs of copying.
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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.