Question about Televison & Video
The problem is likely the deflection yoke.
Try to understand if the noise is coming from the flyback transformer, from deflection yoke and ferrite beads in the horizontal deflection circuits or from one of the boards.
If the problem is one of the boards, then the noise may be produced by a melting capacitor.
If problem is the deflection yoke, then the most common fault is still a cold solder joint. Rather than randomly heating all joints you need to check continuity (read Ohms to verify circuit is closed) to ensure that the solder joints are fine.
Here a service manual
Posted on Jun 01, 2010
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Posted on Jan 02, 2017
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The problem with your television appears to be in the high voltage power supply . This power supply supports the high voltage on the anode of the picture tube, and the voltages for the picture tube, and other parts of the TV. If you do not have a background in electronics, might I suggest that you have a TV technician to come to your location and work on the TV.
I hope this provides some help
May 24, 2007 | Emerson EWF2704 TV
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