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sunhux

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x270 Hdmi output did not produce sounds on TV, only video

https://www.quora.com/Does-an-HDMI-cable-transmit-sound-or-just-picture

Above link indicates HDMI outputs audio/sound as well but when I output it
from my x270 Thinkpad to TV, there's no sound on the TV (I've tuned up the
volume on TV & the laptop).  I'm playing youtube video.

What's missed?
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sunhux

ASKER

Btw, there's nothing wrong with the TV: the Set-Top
box could output both video+audio to the TV using the
very same HDMI port on the TV with the same cable
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Dr. Klahn

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ASKER

Seems like I don't have it: refer to attached screen.

I don't have admin rights to the laptop (as it's a company
laptop).

In the next attached screen, I tried to go to "Playback Devices"
by following what given in youtube link below but my Win 10's
screens showed something different: I found a way to get to
"playback Devices".   Doesn't quite match to what the youtube
link below gave:
https://www.youtube.com/watch?v=ULA15LNGrfA&app=desktop
DeviceMgr_soundvid.JPG
Hdmi2TVnosound.JPG
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ASKER

So it's my x270 Thinkpad hardware's limitation?

Does Macbook Pro 13" or 15" (2012 release) Thunderbolt
displayport when connected to an adapter (displayport to
HDMI) gives any audio output?
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ASKER

Reason is I'm thinking of getting a used Macbook Pro (2012 release)
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ASKER

Borrowed a Macbook Pro & a Thunderbolt to Hdmi
adapter: yes, it outputs both video+audio to the TV.
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ASKER

Just found an x240 that comes with Displayport &
with adapter, it outputs both video+audio to TV.

Hmm, why is the higher end  x270 that comes with
HDMI (no displayport) is more lacking in this aspect
than the x240?