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Re: TV Won't Turn On
Most likely the noise is the pulse modulator trying to start but won't
because something shorted out. Usually the HV transistor, or flyback
driver transistor. But there is a chance the HV diode or a capacitor went also. Please have a look at these parts if you are mechanically able to and know what to do. If you don't know anything about electronics, then find someone who does know what to do and not to touch and have them take a look. You will have to open the tv up in order to check this out.
Please let me know if you have any further questions but basically you will probably have to replace one or more of the above parts.
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There are lots of common problems with flat screens that result in those symptoms. Some fixes are super easy and cost $.35 haha and others can cost hundreds not to mention if your doing it your self or not factor in labor. Lots of people sell tv s like that from $50 to $100 bucks and they sell quick! Hell I'd buy it if I had the chance. Could use parts or god forbid find an easy solution ( rare :( )
This indicates a problem in the power supply either the low voltage switching supply or the High voltage power supply. The sounds you hear is the shutdown circuit activating, I would not suggest that you try to repair this problem because of the dangers involved. I would suggest that you take it to a qualified TV repair shop. This problem should not cost you much, however it is the best choice for the problem you described.
Your problem is a bad sweep power supply or the horizontal sweep circuit has a short in it such as a bad horizontal output transistor as well as the high voltage flyback transformer. These are not problems that should even be concidered to be repaired or attempted to be repaired by an untrained person in solid state electronics. Please seek out a trained service person to estimate the TV for you as there are no user parts inside this set, and a TV set is not a place to be experimenting around inside of.