TV + PC = Sound bar not working

petewud

Novice Member
Hi all,

I hope that somebody could help me with getting my sound bar to work when I have the PC connected via HMDI.

Equipment:
TV: kdl-55w755c
Sound bar: ht-ct780
Graphics card: GeForce 1080 Ti
HDMI cable: DELONG 10m fibre optic HDMI

So until now I have had the TV connected to the sound bar via the ARC HDMI ports and I have the sound bar input set to TV. This has worked great as the sound bar powers on and off with the TV and I can control the volume using the TV remote. I also have a PS4 and Nintendo Switch connected to the TV which also work fine with the sound bar still set to TV.
Now I have decided to connect the PC to the TV using the above HDMI thinking it would just work like the consoles but it doesn't. As soon as I connect the HDMI to the TV, the TV switches to the TV speakers. I have gone in to the TV settings and switched it back to 'Audio System' but then I get nothing. I've also set the 'Digital audio out' to PCM and still nothing. I have tried a different HDMI port and that makes no difference. I have also tried connecting the PC to one of the HDMI ports on the soundbar, but as soon as I do that I can no longer get the TV to play through the sound bar, even if I keep the sound bar input set to TV.
I understand that the HDMI cable is one way and I do have it connected the correct way with the source end connected to the PC and the display end connected to the TV.
Oh, and it doesn't matter if the PC is on or off, it's still giving the same problem, so I think it's safe to rule out any PC settings.
The only way I've been able to get the sound bar to work with everything is if I remove the ARC HDMI cable and use an optical cable. Now this isn't the end of the world but doing it this way I have to use two remotes and manually power the sound bar on and off and I'd much rather continue to us just the one remote.

I'm hoping somebody has some idea of where I'm going wrong.
 

next010

Distinguished Member
Hi all,

I hope that somebody could help me with getting my sound bar to work when I have the PC connected via HMDI.

My guess is its probably the HDMI cable, try moving the PC close to the TV and use a regular HDMI cable see if that makes any difference.

If nothing changes some things to try
1) Get a HDMI-CEC less adapter for your cable this will disable the pins so the TV cannot send or receive CEC commands via that port in case its some kind of obscure compatibility issue.

2) Get the Pulse Eight CEC adapter and put that between your PC and TV, perhaps it can resolve ARC/CEC compatibility issues.

3) Use a Displayport to HDMI cable (no adapters) though you might have to drop the video bandwidth down to YCC422 in NV resolution control panel.
 

petewud

Novice Member
My guess is its probably the HDMI cable, try moving the PC close to the TV and use a regular HDMI cable see if that makes any difference.

If nothing changes some things to try
1) Get a HDMI-CEC less adapter for your cable this will disable the pins so the TV cannot send or receive CEC commands via that port in case its some kind of obscure compatibility issue.

2) Get the Pulse Eight CEC adapter and put that between your PC and TV, perhaps it can resolve ARC/CEC compatibility issues.

3) Use a Displayport to HDMI cable (no adapters) though you might have to drop the video bandwidth down to YCC422 in NV resolution control panel.
Thanks for the suggestions!

It's a bit awkward to try moving the pc closer to the TV at the minute but I've gone ahead and ordered the HDMI-CEC less adapter. I didn't even know that such a thing existed, but it sounds like it might just do the trick. I'll post back once it arrives.

Oh, and I forgot to mention that I went with that HDMI cable as I may upgrade to a 4k TV at some point, and from doing a bit of reading it appears that optical HDMI cables are prefered for 4k at 10m.

It's good to know that there are still a couple of options available if the adapter doesn't work though.
 

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