Windows 10: Why won't my laptop play audio through HDMI?

I understand this is a common problem, but I have looked at countless articles and literally nothing has helped me.I'm on Windows 11 using a Lenovo laptop, trying to play video and audio through an HDMI cable connected to a Vizio TV. Video is fine; audio is not.I have already tried updating my drivers and updating my computer; neither have worked. I have also uninstalled and reinstalled my audio drivers to no avail. HDMI options do not appear in Sound settings as an option, even when "Show Disabled/Disconnected Devices" are toggled. HDMI options do not appear in Device Manager, and scanning fo

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HDMI output disappeared on laptop - TV no longer plays audio when connected with HDMI cable.

I connected my laptop to the TV last night via HDMI to watch some shows when I noticed it wasn't playing audio like it usually does. Visual was fine, but audio was only coming from my laptop. Went through various
settings and tried everything from games to mp3s, but it's like my laptop would not recognize my TV for the purposes of audio.

When I go into sound devices, whether the HDMI cable is plugged in or not, there is no Realtek HDMI Output in the devices section, even with disabled/unplugged devices ticked. It just has "speaker/headphones."

Things I have done:

• Uninstalled/reinstalled speakers
  
• Uninstalled/reinstalled/updated audio drivers
  
• Updated Nvidia graphics card drivers
  
• General Windows update
  
• Restarting laptop
  

It's not an issue with the TV as it plays audio fine when the Roku is plugged in. It's not an issue with the cable itself, as I have another brand new HDMI cable that I plugged in and I still get the same issue.
It's worked normally from February up until yesterday when it suddenly didn't.

Laptop is an HP 15-au018wm, Windows 10, all drivers are up to speed.

 

HDMI audio

If the Digital Output Device or HDMI is not an option under the Playback tab. You can run the Hardware and Device troubleshooter by following these steps:

• Type Troubleshooting in Search or Cortana.
• Click on “View All” in the top left corner.
• Choose Hardware and Sound.
• Click Playing Audio to run the troubleshooter.

Keep us updated with the result.

 

HDMI audio driver for ASUS X551M laptop?

This is from Intel regarding hdmi:

• Install the latest Intel® Graphics Driver, this also installs the latest audio codecs for HDMI.
• After driver installation, connect to the HDMI TV or digital display, using a HDMI cable.
• Select HDMI audio as your default playback device. Click Start>Control Panel>Hardware and Sound.
• Click Sound. The Playback tab lists the audio playback devices for your computer.
• Right-click on the device for HDMI audio, and select Set as Default Device.