If your computer is connected to the TV through an HDMI cable, but there is no sound, you can set it as follows:
1. First, make sure your TV is properly connected to the computer, and the monitor and speakers are working properly.
2. In the Windows 7 system, right-click the blank space on the desktop and select "Screen resolution".
3. In the pop-up window, find and click the "Multi display" option.
4. In the Multi Monitor tab, confirm that your TV is set to Extended Mode.If not, select this option to enable extended mode.
5. Click the "Apply" button to save the changes.
6. Next, find the volume control icon (a small speaker) on the taskbar, and right-click it.
7. Select "Play Device" from the pop-up menu.
8. In the window that opens, find and select the device that corresponds to your TV connection (usually labeled HDMI or related to your graphics card).
9. Click the device and make sure it is set as the default playback device.If not, please click the "Set Default Value" button to change it.
10. Click OK to close the window, and check whether there is sound output after testing a piece of audio.
The HDMI module is installed on the video card. You need to install the audio driver from the video card manufacturer. Otherwise, there will be no sound. It can be found on the CD provided with the video card or downloaded from the website.Nvidia's is in an Audio folder. I don't remember AMD's, please look for it.
The TV has no sound: 1. Check the computer sound output device. HDMI digital output device should be selected. The correct situation should be that after connecting the HDMI plug, it should automatically jump to the HDMI device 2. Adjust the properties of HDMI device. When playing high-definition, many high-definition audio tracks are in AC3, DTS or more advanced formats, which cannot be processed by televisions. The output audio should be as simple as possible, and televisions can only be used to broadcast relatively simple sound signals such as analog stereo and dual channel stereo. 3. Volume adjustment, including computer output volume and TV volume 4. HDMI interface specification of TV.For some TV sets, the HDMI interface may not be able to process audio. Like our Toshiba TV, the settings of the two HDMI input terminals are not the same. One interface can automatically or manually select several different sound input modes 5. Sometimes it is normal to change an HDMI for the wire.
