Okay (unfortunately) I am having the same problem right now. Here is some debugging:
Even though I can hear the sound of volume change that Windows makes, no sound from applications such as Spotify etc is getting outputted. Here is a screenshot from the mixer:
Here are commands I used previously:
1. Check if audio services are running
> Get-Service | Where-Object {$_.Name -like "*Audio*"}
Status Name DisplayName
------ ---- -----------
Running AudioEndpointBu... Windows Audio Endpoint Builder
Running Audiosrv Windows Audio
Running RtkAudioUnivers... Realtek Audio Universal Service
2. List all audio devices
> Get-PnpDevice -Class Media
Status Class FriendlyName InstanceId
------ ----- ------------ ----------
OK MEDIA MX Brio USB\VID_046D...
OK MEDIA Microsoft Streaming Service Proxy SW\{96E080C7...
OK MEDIA Microsoft Surface Thunderbolt(TM) 4 Dock Audio USB\VID_045E...
OK MEDIA AMD High Definition Audio Device HDAUDIO\FUNC...
OK MEDIA Jabra SPEAK 510 USB USB\VID_0B0E...
OK MEDIA Realtek(R) Audio HDAUDIO\FUNC...
OK MEDIA AMD Bluetooth Audio Device ACP\DEVTYPE_...
3. List installed audio drivers
> Get-WmiObject Win32_PnPSignedDriver | Where-Object { $_.DeviceClass -eq "MEDIA" } | Select DeviceName, DriverVersion, Manufacturer
DeviceName DriverVersion Manufacturer
---------- ------------- ------------
Microsoft Streaming Service Proxy 10.0.26100.1 Microsoft
USB Audio 2.0 10.0.26100.1150 Microsoft
USB Audio Device 10.0.26100.6725 Microsoft
USB Audio Device 10.0.26100.6725 Microsoft
Realtek High Definition Audio 6.0.9738.1 Microsoft
AMD Bluetooth Audio Device 6.0.0.32 AMD
AMD High Definition Audio Device 10.0.1.38 Advanced ...
4. List sound devices and their status
> Get-WmiObject Win32_SoundDevice | Select Name, Manufacturer, Status
Name Manufacturer Status
---- ------------ ------
USB Audio Device (Generic USB Audio) OK
USB Audio 2.0 Microsoft OK
AMD High Definition Audio Device Advanced Micro Devices OK
USB Audio Device (Generic USB Audio) OK
Realtek High Definition Audio Realtek OK
One thing I might wanna add here is that the laptop itself is in a Clamshell mode aka monitors are attached and the laptop itself is closed (though functioning)