After getting tired of yelling at my HR20 and brand spanking new refurbished HR21 because I was pushing buttons on the remote and nothing was happening for 3-7 seconds, I bought (yes, I know, leased) a new HR24. Wow, these things are enormously fast. I expected them to be snappier but not this fast. Sometimes the menu is up before I let go of the button. But I see one issue, and that is when doing a system test, I get a failure that says that the receiver is experiencing some network issues and if I'm having problems with playback I should contact directv. I've gotten diagnostic codes of 72-79-090 and 71-73-79-771. I tried unplugging the swm power supply for a minute and plugging it back in and rebooting. Same results. The other two receivers arent reporting this error. I just had the swm/deca stuff installed last week. I'm not having any playback issues, everything seems to work fine. I do have a ~2 week window to return this to J&R for another one, although I have to pay for shipping and we already have some recordings on the dvr. I think that if it breaks down a month or two from now that Directv will send me another POC refurb from 2008 and I'll be stuck with that and my new 2 year commitment, along with having paid out of pocket to get the HR24 for its decent performance. Is that the case or will they replace a 24 with another 24? Is the diagnostic code even something to worry about? I've seen plenty of threads where people get diagnostic codes about dish pointing and some people have reported network/playback diagnostic codes without actual problems.