"Cheap ones have a circular end and go in easily but tend to fall out almost as easily. Better ones have a rounded off square ends which must be matched to the socket. They only go in when correctly orientated. Make sure you have them the right way round using a magnifying glass if necessary and push them in firmly. They can be quite tight. "
Yesterday I purchase a Samsung HW-FM55C/ZA Soundbar and all works well except the optical cable has to held at both ends to connect? I wrote Costco and Samsung and bought another cable on Amazon.
My Sony TV only used one HDMI input at a time so I could not use that to connect the sound or am I missing a trick? - Regards TTL