Background. I had 2 HR21s and an HR20 going through an 8 port switch to a slimline. I also had all wired to my LAN with CAT6 with whole home. I got an upgrade yesterday to a SWM16, DECA, and an HR34 to replace the HR20. The HR21s are connected via single wires now DECA. The HR34 is connected via the IRD port on the SWM16 power module. The HR34 is showing the 776 and when checking the tuners, tuner 4 does not work. I haven't physically looked at the SWM16, but I'm wondering if the problem is in how it was installed?