Solution: Reinstall Sound Card driver.
Steps:
Open “Device Manager”.
Locate Sound, Videos and Game controllers from the list.
Double "Realtek or Synaptic Audio" or Right click and select Properties.
Select Change Settings, if on user account. (ACTION REQUIRES ADMIN ACCESS)
Navigate to the “driver” tab.
Select the “Roll Back Driver” option if highlighted. Then follow the prompt and select “Yes”. If the “Roll Back Driver” isn’t highlighted, skip to step 6.
Select “Update driver”.
Click “Browse my computer for drivers”
Click “Let me pick from a list of available drivers on my computer”.
Select “High Definition Audio” and click next to install.
The speaker should start working immediately, if not, restart your device.