I am a sophomore at college and I brought with me a 20" APEX TV that is aboyut 2 years old. It worked perfect all day. I turn it on and the sound was great but i plugged in Xbox into the inputs on the side of the TV. the sound shut off and hasn't worked since. I unplugged xbox. Shut the tv off the back on. unplugged the TV from the outlet. I tried again and still no sound. The sound comes out of Xbox and my dvd player but not for the tv channels.