- IMPORTANT NOTICE: This is high-definition disc. Unless it is described as a "combo" disc, it will only play in an HD DVD player.
- All About Firmware: Having trouble with your high-def disc player? Will certain discs just not play? You may need to update the firmware inside your machine. Learn how and see links to more information on manufacturers' sites.
- Got questions about high definition? Find the answers in our High-Def 101 knowledge center.