Hello, My name is XXXXX XXXXX I will be glad to assist you.
What is the Model number of the LG TV and also of the Vizio Soundbar?
Also, what have you tried so far?
Thanks for the reply. There are several ways to connect these, but the easiest and most reliable, is to use the Headphone jack on the TV, and run an 1/8" to Stereo RCA cable to this jack (shown at the link below), and plug the 1/8" into Headphone Out on TV, then RCA ends to RCA Inputs on Vizio Soundbar.
Here is the link to the cable you'd need:
It is also available at Radio Shack, or Walmart.
If you need further assistance, let me know.
If this answers your question, please click "Accept", as it is the only way we Experts get paid for our knowledge on the site. Tips and Bonuses are welcome and appreciated!!