I came home after being gone for 3 hours and suddenly my guide says 'No Information Available" on all my channels beyond the next 2 hours. I also cannot scroll out beyond what's on the screen even though I can scroll up, down, and backwards. I checked all fittings and did a cold reboot (turned off the 722 DVR and turned it back on). All sats are showing green. Any ideas beyond calling Dish? If so please be specific as I'm not the most adept guy around. Thanks.