I have a SWM16 with 2 8 way green label splitters. Splitter 2 from output 2 has HR34 and 3 H24s. Splitter 1 has 4 HR-2x dvrs. This setup has been working fine for 5 months. I got the HR34 in January so all 16 tuners have only been in use for that time period. The SWM16 has been around for at least 2 years. We woke up last Wed with 1 of the Dvrs getting the 771 error. I called D* and they sent a tech. He replaced the splitter 1 and rewired the SWM power claiming that might be the problem. I disagreed with him but it was working when he left. The very next day the power went out briefly and when all of the receivers had rebooted the same dvr was getting a 771 error. D* sent another tech. He replaced the same splitter 1 and rewired the SWM power the way it was before tech 1 and the correct way IMO. Once again everything was fine when he left. This morning, we had another power outage (it is storm season in NC) and this time a different dvr on splitter 1 is getting the 771. All other receivers are fine just like the last 2 times. D* is sending another tech. Should I push him to replace the SWM16 as it could be causing the splitter to have a problem with apparently losing only 2 tuners? Any other ideas as to be what could be causing this? Also I should mention that the SWM power inserter is on a UPS but none of the receivers are on a UPS. BTW this time when the tech replaces the splitter. I am going to reboot all of the DVRs before he leaves !!!!