Check for two locations - on the back of the set itself, lower right hand side. A switch for the speakers (EXT -up-, INT -down-) should be in the down INT position for the TV's internal speakers. Also on the TV screen go to MENU> AUDIO> SPEAKERS> press enter to check the ON button. Of course the other option is a separate amp (using the rear Audio Output RCA jacks), or below that the LEFT/RIGHT external speaker connectors.
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Go in to the menu for the sound setup. Make sure that the sound is not on MUTE, or SAP. Make sure that the speakers of the TV are in the ON mode, or any sound system that the set feeds is setup okay for the TV.
It is possible by coincidense that something in the audio section of the set has failed.
All of this has nothing to do with sitting on a remote control...!!!
this is a very common problem just unplug tv for 5 minutes it
should fix it . simple fix most of the time with rca and proscan.
If that does not do it go into menu scroll down to audio and then press on .
I have a GE 46 in TV that had the same occurrence. I believe it is a sign that the amplifier is overheated or stressed. The way I fixed mine was to unplug TV and leave off for a few minutes -then plug in. I discovered this by accident when the power went off one day and the sound returned (had been using my vcr audio output plugged into my stereo for weeks!) This fix will work for weeks-sometimes months-evidently resets the circuits inside the amp somehow. Last time this happened I also removed the back of TV and blew out the dust with compressed air while it was unplugged-still have sound 4 months later without a "reset"-so I'm guessing it did help .
Your problem is somewhere between the tuner and video detector circuit.
The signal entering your TV carries: video,red color,and blue color as well as sychronizing pulses for color and horizontal and vertical deflection ( actually vertical sync. is derived from horizontal sync.) along with burst pulses to synchronize the color. After all these, the sound is an fm signal entwined with a pilot signal for stereo audio. WHAT a mess!
After the audio passes through all this, it is detected and sent to the audio processor.
If any frequency has drifted away from it's value then you loose the sound.
SO... your problem could be in any of the tuned circuits or in the audio processor IC (chip). Any component changing value could creat this problem. Most likely the audio processor IC. You'd need to have the set checked out by a tech to find your problem.
You didn't mention if you were using the TV with a cable or satellite TV box which could have its sound turned down or be defective. Otherwise, if you have a VCR or DVD hooked up to the set, do you get sound then? With some TV's there is a menu selection where you can turn the speakers off and on some sets, there is a switch to mute the speakers. If you still can't get sound and the set is out of warranty, then a replacement is probably in order.
FDirstly, you should not connect your TV to a Sound System. If you desire to listen to your Broadcast TV , and enhance the listening experience,I suggest you use the Audio L & R outputs of your Cable Box to your Sound System AUX IN , and Video Out to the TV's Video IN socket. Then you will recieve a better picture and a enhanced sound quality. But just directly connecting the TV's Audio Out to the Sound System will make scarcely any difference.