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.
plasma tvs buzz a lot, depending on screen brightness. its probably normal but if you can hear loudly over your volume, may be a bad board or plasma panel. from behind tv, left side = y board, right side = z board, middle = power board ---- bad panel can buzz from anywhere... if you hear all parts buzzing, its probably normal plasma noise
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. ;)
I had the same problem when I connected my new At&T cable to the tv card in my PC. I did a little internet research and found out that the problem is called "video buzz". It is where the video signal bleeds into the audio signal. I was connect via coax to the cable box. I was able to fix it on my system by "fine tuning" channel three (my TV card has this capablility). Your system may or may not have this feature. If you are connecting using the A/V input it may be something else.