-- Sorry, no idea. But it'll be interesting to see what the knowledgeable audio-techniphiles recommend for you to try and do.
So same HDMI cable was used for connecting the blu-ray player? So the cable is prob good. Although have you tried other HDMI cables to soundbar(s)... just for the heck of it?
Was a different cable used but totally I’ve tried four of them and none worked.
And no changes had been made to either your tv or soundbar HDMI / input settings before problem arose?
And the blu-ray player was connected---with same HDMI cable > to same HDMI ARC port---and sent sound to tv's speakers? Which would mean the HDMI ARC port could not be hooked to soundbar at same time. So how was tv hooked-up to soundbar when blu-ray player was occupying the HDMI ARC port? Or how would tv sound be sent from tv to soundbar -- with blu-ray plugged into the tv's HDMI ARC? With an optical cable? If not, have you tried an optical cable from tv to soundbar(s)?
****Exactly. But this is what the technicians that were said they did and according to Samsung this was proof that my sound bar was bad, not their HDMI ARC connection. Optical works just fine but ARC gets rid of some remotes when working properly. Right now with it hooked up to optical and turned on I have to go into the tv settings and change the sound source to optical since it defaults when turned off to the tv speakers. Kind of a stupid setup but welcome to the world of Samsung.****
I think I've heard or might've read that an HDMI ports' internal chip or chipset can go bad. Not sure how you'd check that. But could it possibly be the tv HDMI ARC port?
****That’s along the lines I was thinking also. Just because it’s an HDMI connector doesn’t mean necessarily that the ARC feature is working properly. I think!!!****
Have you tried running your sources (ie- tv cable/sat, BD player, other media players) thru soundbar(s) first -- then just HDMI ARC (Out) > to TV ? Or have you tried other HDMI ports on tv?
****Update. I now think there is something electrically wrong with the ARC connection. I say this because I took both my Vizio and Samsung soundbars into my bedroom and hooked them up and couldn’t get any sound in their either. Made sure the tv speakers were off and the ARC was on. I think this Samsung tv somehow has fried two sound bars through its ARC connection.****
In the meantime, you might try connecting an optical cable to your soundbar(s), if you haven't already, to see if that brings back audio to soundbar(s). Sorry I couldn't be of more help to you. Keep checking back, as some more knowledgeable mem's will surely be along. Just didn't want you to feel all alone. Best wishes getting it resolved.
****Optical works fine but since I’ve gotta month of my factory warranty on this tv left, I want it working the way it should.****
EDIT: If nothing helpful was found in the soundbar manual .pdf's etc---on the soundbar website(s)---can you call or email their tech support?
****I’ve finally got them to agree to another service call next Friday. Now I have to go buy another sound bar that works. This time I’m going to have it ready to plug in but not have done anything, even turning it on, until they arrive!****
Thanks for you thoughts