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Re: My Sony KV-9PT50 has no sound.
Is there a audio when you using the av input using a dvd player or a camera? if there no sound in any input you selected....check the speaker and if the speaker is ok...... check the audio amplifier...in you do not have any knowledge in electronic do not try this cause you might electric shock better go to the service center...
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go thru the menu and see if the speakers were turned off (to accomidate a surround or other audio device). Thats what happened to mine... and I only found out after I replaced it and my kids were playoing around with it...
maybe you problem is in the circuit board of the tv.loose solder joints.you need a technician to fix the trouble.do not do it yourself,if you have no knowledge in electronics circuitry.lethal voltage is present inside the unit.
its either you have a problem in the horizontal output,most probably flyback transformer or horizontal output transistor or ther is a defective component in hori. section.do not do it yourself.lehtal voltages present.contact qualified technician.
if your television is an older model probably the switch is defective.need to be replace,if its a newer model then the trouble must be in the power supply section.contact a tv technician tto check the trouble.