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Hello; I am John at J. D. Electronics, Poland Maine. This problem is very likely caused by SAP selected on your remote control.
Make sure you have selected Stereo or Mono in the audio menu. You can
find all of this in your owners manual ( which you can probably download if you don't have it). Good luck, John
Could be bad reception and or make sure the tv which was in the cable mode when you had cable now needs to be in air or antenna mode. IF you have another tv that works ok then you will know the channels just need to be reprogrammed for over the air signal. Go into the menu of tv and find program channels and switch to air or it might say antenna..
You might try resetting the TV to the default (look in the Menus for a Options or Tools menu and a command like Restore Default or Memory Recall). Then exit the menu (and save the settings). Return to the menu and rescan all channels.
I do not know if this will help in your case but it is a simple thing to try. I have a tv (a different manufacturer) that had a similar problem. When my outdoor antenna was pointing directly at transmitter, the closest station gave me no audio on one sub-channel and no video on the other. All the other stations were fine. Doing the reset and subsequent rescan resynched the audio and video for the sub-channels.
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
after replacing microprocesser ST92T195D7B1 all the menu's are ok including english menu .But their is no sound through tv channels. when playing dvd the sound is ok.so i still need some help. kind regards kingkash