I have just got my new TV. Installation was fine and all channels were found. However, there is a buzzing noise coming from the set, but no actual sound. It is not on mute and as I turn the volume up the buzzing gets noisier. The picture is excellent.The sound works when there is DVD playing?! An exchange has been sorted out, but they can only do that after Monday. Is there a serious problem or is there something I can do to fix it
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A common cause are failure of decopling capacitors in the audio section, and or the circuit board power distribution that feeds the audio board. Most of the capacitors are surface mount components. The standard fix is to start by changing the circuit boards that have the defective parts.
If the set is under warranty, call for warranty service. Out of warranty service is expensive for these TV sets.
Sounds like the main power supply board has packed in, you can buy these and are reasonably easil to change your self as all the leads have push on plug connectors and will not go in to the wrong place,
Long story short: Had the same problem with my Soyo. Thought it was the power supply board problem that everyone else was reporting. ordered one. Plugged it in. Did not work. Inspected the Main/Logic board and found what looked like a black button that could be depressed. It is located to the right of main processor on the board. You can't really miss it. With the TV plugged in, I pressed the suspect button. The TV made a buzzing/clicking noise for a few moments and the stuck blue illuminated power button faded away. Curious by this, I pressed the power button and low and behold the TV comes to life! Looks like I found a "reset" button which seems to have fixed my problem. Thanks Soyo for not bothering to mention that such a button exists. I hope the rest of you have the same good luck. In the event you are still in need of a power supply board, email me. I have a spare now it seems. ;)