Thank you for your response.
I have tried all HDMI ports having been advised by Panasonic that I should be using port 2 with eARC active.
Out sound settings has been selected and than selecting the port in which time I also tried using the other ports.
Please note I'm using a converter to audio in with the right mode.
TV has the Latest firmware installed.
Thanks for helping me troubleshoot this issue.
i have attached a copy of the Panasonic surround Sound System.
Panasonic_SC-HT500.pdf