The sound is fine, the tuneer changes channels. however we cannot get a picture nor a menu to change video channels. it will change video channels but we cannot see the change.hope you can help.
sony bravia lcd 40inch
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Are you by chance on the SAP audio channel instead of the main channel? You should be able to go into the menu and look at the audio settings. If you are on SAP change it back to main. Some stations do not have audio on the SAP channel.
I could be wrong, but it sounds like the TV hasn't gone through channel setup. You have to do this in order for the TV to "learn" the channels, assuming you are using cable. If you are using cable run channel search in the setup menu and see if that changes anything. Can you change channels by manually entering in the channel # and hitting enter?
Your TVs tuner tuned a little off frequency. It could be as simple as having cable box on where you have good picture but fuzzy sound, use the TVs remote to change the channel and then change it back to proper channel. If that doesn't fix you may have wrong tuning type selected in channel set up menu.
I hv philips 21RF vardaan TV ,there is sound on AV channel. and the picture is blinking. even some menu setting have changed.. i tried using the service menu but cudnt understand anything. 2 new av channels have come.. av2 and front which were not present before. sound is not coming even on the other channels but picture is fine on them. only on the av1 channel it is blinking., the philips technision had solved this prob once by pressing some code by remote and i don't know the system code
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.