Solved! How to connect acer aspire 5738 to lcd tv

Solution
Depending on what kind of graphics card it has, you'll have to install the sound driver for it to get it working. If the driver is already installed, go to the sound properties and set the hdmi sound output as the default sound device.
Depending on what kind of graphics card it has, you'll have to install the sound driver for it to get it working. If the driver is already installed, go to the sound properties and set the hdmi sound output as the default sound device.
 
Solution