I know there have been several reports of no tuner 2 for HR21 and 22, including my own, but after several calls and one service call to the house to trouble shoot, I am still in the same boat. I have 2 HR20 and one HR10 connected using Zinwell 6x8. No problems. Upgrade the HR10 to HR21-200 on the 18th and immediately received the 771 error on tuner 2. Tried the new HR21 box in all three locations I currently have my other boxes connected (all receiving tuner 2 fine) and same results on the HR21, no tuner 2. Went to Costco and picked up an HR22, connected it and same problem on tuner two. Yesterday the DirecTV service man came and went through all the steps I did, including switching the cables and BBC’s from each Sat in on the box and by passing the multi switch and running directly from the dish to the one new receiver and same problem on tuner two. He then went to his truck and brought in another new box (a HR22- by the way) and again same issue. He was stumped. He said he would come back next week with a new dish and try that. I guess I am confused as to why my other boxes have no issues on tuner 2 but these three new boxes do? I am not nearly as well versed in this as most of you so if anyone can offer any suggestions as to a solution I would be very grateful. Oh, would a SWM possibly be a solution? I don't know too much about them except that I believe only one tuner is necessary. The guy that came out said he hadn't seen them and only the upgrade techs can install them but knew about them and thought that might be a last resort.