All the Receivers on one side of the SWM -16 are not working. They are: 1 genie & a client and an H24, all three connected to three 4K Sony TVs. 771 and 775 Error codes. Restarting satellite set-up shows SWM not detected. Resetting the SWM power supply does not help. The other half is fine. All 4 DVRs are working. Bad SWM or bad connection? is each side connected to the LNB separately? My dish SL5 LNB and SWM-16 are mounted on the inside of the chimney wall where the roof starts and I hope the technician can work from the ladder. It will be so much easier and safer if he stands on roof where the wide chimney joins the roof but there is this stupid rule about not leaving the ladder. I have seen the technicians work both ways but few times they were afraid to do their job. Do I need a New SWM or new LNB? Are the new 4K channels coming which requires new LNB or ATT abandoned that idea?