How do i make an HDMI cable carry both sound and Video?

Gateway don't provide specs for the motherboard ... and more specifically regarding connectors available for the graphics and audio sections of the board. As delivered audio is only available from the ministereo jacks and the digital coax jack on the back (and the TV tuner card output ... but the latter isn't useful if you are using the TV tuner in your Sony HDTV)... and ONLY video is output on the HDMI jack. Therefore you can't use HDMI (per stock configuration) to get BOTH audio and video. You CAN feed video via HDMI and surround (multi-channel) audio via coax (or multiple minijacks) to a surround receiver or TV (with suitable inputs). That said, there is little point in surround to most TVs since they only have stereo speakers (so just use the front speaker output). If you want surround use the coax connector to an A/V receiver (or use a coax to optical converter (monoprice.com sell for under $10) if you don't have a coax input available, but do have optical). Note there are undoubtedly configuration settings to tweek if you start into this. You MAY be able to hook up the audio output to the HDMI output via some form of jumper internally ... but for that you will have to contact Gateway (or maybe a forum somewhere). Hope that helps.

the other people here are wrong. it is possible to run HDMI from your computer with audio and video. you do need to have an extra cable inside your computer though. your video card should have a small connector on it that needs to be connected to either your motherboard (onboard audio) or your audiocard. it will be called a s/pdif port most likely.

The HDMI coming out of your computer is from your GPU which doesn't handle sound... aka impossible. you need to have another cable coming from your sound card or motherboard (if you don't have a sound card) to your TV.