Toshiba Equium A210 - Manual (Page 125)

User’s Manual 8-13
A210
Settings for audio on HDMI
To set the audio device to use the HDMI, follow the steps below.
1. Go to Start then select Control Panel.
2. Click Hardware and Sound then select Sound. If you are in control
panel classic view, select Sound directly.
3. In Sound window, select Digital Output Device (HDMI) then click Set
Default once.
Selecting Audio HDMI output
Please follow above steps to change back to speakers after you plug out
HDMI connector.