I have a Samsung led tv 40 inch and I bought a cheap goodmans 50 watt sound bar on the back of the sound bar it only has red and white ports I plugged the cables in red for red and white for white on TV and sound bar but I can't hear nothing is there something 2 do with my setting on my TV maybe as when I took the red cable out the back just 2 make sure it was in it sounded loud so I must be getting something wrong could some one help plz cheers