Need help connecting hr21-200 to wireless internet

[Hutch1814]

No, i cant even get to the step where it "scans" for the router or asks me to choose one. Yes

You need a hard wired deca. If I recall you don't have MRV so running an Ethernet cable straight in will be alright except you'll only get internet on one receiver vs all. Something is off with the newer black Att routers and directv is aware, we can't get wifi decas or internal decas to connect to them most of the time