I've been having problems with missed recordings, etc... so thought I would check my sat signals on my HR21-700. I discovered that I'm now not getting any signals on any sat for Tuner1. Tuner2 is fine. I'm not sure when this started as I've checked sat signals in the past and I know that Tuner1 was working. It must have quit working when my missed recordings started a couple weeks back. I have a HR20-700 in another room and both tuners are working fine on that DVR. I've checked connections, b-band (i think that's what they're called) pluggled into the back of the DVR. I can't find anything obvious and am not sure why Tuner1 would all of a sudden stop working. Does anyone have any ideas on anything else to check before I have to make the dreaded call to DTV? Thanks for any suggestions.