Samsung TSL2793HF 27" TV "headphone connected cut sound" Questions

...headphone jack, the main speakers cut out (I need both sources of sound, the headphone for me, the speakers for my wife). Radio Shack says that this can be addressed by changing the onscreen settings ...

...cut out randomly for 15 minutes at a time, then work for hours. Problem started initially 2 weeks ago, as of the last 4-5 days, the sound doesn't work altogether. Even by inputting headphones are ...

...headphone socket is faulty, it does not bypass the sound to the speaker. When head phone is connected, the connection to the speaker will automatically cut of. When it is pulled out from the socket, ...