I've been having trouble with a single tuner (tuner 2) occasionally (very randomly) losing mpeg2 broadcasts. I thought I had traced it down to a problem with the tuner in the machine as I confirmed that another HR20 did not have the problem when the other 20 did. I switched the coax into the machine to make sure it wasn't a problem there but it kept appearing on tuner 2. I switched the coax going out from my multiswitch to make sure it wasn't a problem with the multiswitch. I was pretty convinced it was the machine and called DTV to get a replacement and moved the HR20 that didn't have the problem up to my main viewing area. Now that I'm watching this 20 a lot (previously it was the kid's machine I rarely watched - except to confirm it wasn't suffering from the same problem as the other machine), I've seen two occasions when both tuners lose access to mpeg2 broadcasts. Both times I was watching a recording and when I came back to live I couldn't tune to any station in the 70s. The first time I got them back when I tuned to an mpeg4 HD local broadcast. The second time that didn't work, but I got them back when I tuned to a standard SD broadcast (NFL Network). Before I got it back, though, I tried to record a few minutes of an mpeg2 broadcast that I had a blank screen on. The first time I tried to play it after getting my mpeg2 stations back, I got a blank screen. The second time I got a broadcast from a local SD station (Fox) that had been recorded in the place of the mpeg2 broadcast (HDNET). In tuning to different stations to try to retrieve my mpeg2 stations, I had tuned to an mpeg4 HD Fox broadcast momentarily (for a couple of seconds, at most). But what I got on the recording was three minutes of the SD version of that same Fox broadcast. What in the heck is going on here? Could it possibly be that I've got two machines that have problems with occasionally losing mpeg2 broadcasts? Could my third HR20 be the charm? Any help with understanding what might be happening here would be appreciated.