I'm getting the same message on both of my HR20-700's that the guide data has failed to update in the last "X" hours. I have an SL3 configuration. I have checked my signal strength readings on 101 and all appear to be good. I have tried to run a system test on both receivers, but both receivers seem to "lock up" when the reach the 18% completion point. My H21-200 doesn't appear to have this problem. Any suggestions? Any further info needed to assist in diagnosing?