What does Windows Sound Panel show?
If Windows Sound Panel is showing the Main Audio Device as being connected to the motherboard and not to the GPU card you won't have any sound from the GPU Card.
Make sure the Main Audio Device in Sound Panel is the one showing AMD HD AUDIO as Default.
Also you seemed to have a Laptop since you are posting a Laptop Mobile GPU card.
If so you need to download your Laptop's AMD APU Driver that will install both the IGPU and DGPU in your laptop.
Unless you have a Intel APU then you just need to download the DGPU driver.
If you do have an Intel APU you must have the latest Intel APU Graphics driver and Chipset installed plus the latest BIOS version for your laptop.
Use DDU (Display Driver Uninstaller) with the internet disconnected and AMD Driver Installation Folder at C:\AMD deleted BEFORE installing the current AMD driver again.
NOTE: Can you upload a GPU-Z image of your laptop's GPUs to see if the AMD is correctly installed?