Advertisements I have a Direct TV HR10-250 HD DVR. In the past week or so, many of the channels (most of the non HD channels) began to pixalate, looking precisely like something was in the way of the dish. I cut down some growth close to the dish outside, but the problem persisted and then worsened. Now I only get the message "Searching for Signal on: Satellite in 1" on most of the channels 200 - 400 and up. The XM channels in the 800s are about 50/50. The ones that work, work fine. Some other non-HD channels work fine (RFD, EWTN and a few others) and have no pixalation and no "Searching for Satellite" message. The HD channels (72 - 79) work perfectly, as do my local channels 3-45 (both sat and ant). Also, the DVR rebooted itself several times over the past few days. My guess is that one of the tuners has gone bad. Is that a good guess? If so, where can I buy a new tuner? Can I replace it myself (I'm no technician, but I build my computers and upgraded the DVR with a new HD 8 months ago)? Any help will be graciously appreciated. Thanks.