Hi,

Here is a link which may be of some help.

Try the 'Sound Test' first ( if it is available on your model) and if it doesn't help with finding a solution try the 'Reset' option and see if it helps.

http://www.samsung.com/au/support/skp/fa...

Also, if you have an headphones connection on the TV, try it and see if the problem exists. It may be a 'speaker' problem as opposed to an audio one.

iFixit Staff Suggestion: There are several helpful answers here! For more information that can help solve this, check out this page on Samsung TV sound problems