I have a brand new, but cheap Sylvania 27" stereo tv...I paid $150 for it ..model no. 6427TFY....I tried hooking up a Radio shack Single point, surround sound Speaker system....I hooked it from the back of the tv into a red and white audio port....I have tried any and all settings to try to get some sound, but nothing has worked...Can sombody help me?....Shnoop