I recently assembled a computer. Everything works fine except for the dvd burner. It seems that when movies are played on it, the video works great but there is no sound. When a music cd is played on the drive, the sound works fine, also when a computer game is played on the drive the sound works fine. The only issue is when a movie is played there is no sound. If anyone has experienced this issue please reply. Any help with this would be greatly appreciated. The motherboard is an ECI K8T800-A with onboard sound. Thank you.