20 Most Recent Supersonic Sc-31 5.1 Channel DVD Player With Hdmi Up Conversion, Usb, Questions & Answers

what you should do is first check the volume and if that dosent work try reseting your computer

It's a 5.1 surround system which means every output has its unique sound.try the setting the sound to stereo,or just plug into diff. outputs till u get the right one

ipod touch has a light piece of plastic on bottom where it connects to the dock youtube has a video on how to remove it softly with a razor blade and once it is removed it will work properly although to be played through stereo i must have my ipod touch 4th gen on airplane mode

There are a lot of possible failures but if you own tecnical skills look at the power supply first and measure the output votages.