I transitioned from unsupported MRV to supported MRV last week. I also upgraded from a SWM8 to SWM 16. I was in a real rush while the tech was here and the service call was running long so we did not check one of my boxes for internet and MRV connectivity before he left. The others were working so I assumed all would work. I have one box that won't get internet or MRV. It previously connected no problem thru unsupported MRV. My system is a SWM16 with an HR34 and a HR24 being fed from the channel 2 of the SWM thru a 2 way splitter. I also have a HR22 and a HR21 being fed from channel 1 of the SWM thru a 4 way splitter. It is not a green label splitter but it was a splitter that I used with the SWM8 and was an approved splitter for the SWM8 when originally installed. The tech said a green label splitter wasn't required since the SWM16 is powered directly into its power port. The cable distance from the PI to the SWM is only 5 feet (Is that a problem? I have read something about 15 foot minimum of RG6 but don't know if that applies to the direct power port on the SWM.) The HR34, HR24 and HR22 connect to the internet and see each other over MRV just fine. The HR21 can not connect to the internet or see the other boxes. Nor do the other boxes see the HR21. I have checked all connections, rebooted the HR21, checked to make sure the DECA wasn't bad by switching the HR22 DECA and HR21 DECA, rebooted the SWM, and called Directv tech services and did troubleshooting with. No luck with any of that. I have a service call tomorrow afternoon but hate waiting around for them. Any other suggestions on things to try before the tech gets here?