TV is connected to computer with HDMI so that I can stream videos from computer.. When I stream videos, I get the images but no sound.?

HDMI audio on PC's are setup almost like a different audio device. You need to find the HDMI audio settings on your PC usually located within the audio settings and volume controls and see if you see anything off. Otherwise try a newer HDMI cable. That said, sometimes older PC have issues with HDMI audio and you have to run a separate audio cable to the tv from the 3.5mm jack on the PC.

Check your sound settings on your tv and computer.

check your audio output settings on the computer, be sure you choose your HDMI audio. also be sure your TV isn't muted.

otherwise try a different HDMI cable or port on the TV.

So... while "P" and Land Shark make good points - and they are accurate, there is one other item assuming you want the audio to come from the monitor and not the computer... increase the volume on the monitor - it may be set at 0.

The output settings in your computer may be messed up. If you're using windows then i suggest right-clicking on the sound icon on your taskbar and clicking "open sound settings." Then choose your output device to be your TV.

Right click the desktop speaker icon and select playback options. In playback nominate HDMI as the default. Look for disconnected devices if it's not listed.

Or: control panel > sounds > change system sounds > playback > click on the device and set as default in the bottom if the window

No good? Maybe an updated driver is needed