All of a sudden today around 2pm MDT the guide on my 721 refuses to come up. Push the "guide" button and it just stays on the channel you're watching. Push "menu" and then "guide" buttons same thing, just stays on what you're watching. Did the "power button reset" and then the "smart card reset" but no guide. Finally, pulled the AC plug, let it sit for about 15 minutes and then plugged it in. Rebooted and stil no guide. Called Dish and, of course it's news to them ... never seen that! Do me a favor and check the guide on your 721 and post results so I know if it's my box or Dish. Thanks all.