Connecting an eth. line to your DVR will disable MRV in a DTV supported setup. (Broadband Deca installed). Usually restoring it requires jumping through a couple of hoops. 1st remove that ethernet cable from the DVR then unplug from from the wall or from the back of the receivers the 110 volt power, starting with DVR then other receivers in any order. After a few minutes plug DVR back in, letting it come all the way back up til a picture is veiwed. Through menu (Whole Home) insure that it is set up to still share playlist and location has remained as set up. Whole home should still say authorized. Bring the other receivers up completely, one at a time, insuring their locations have remained intact.....at that point each receiver as you bring it up should "see" the DVR. ONE at a time. Sometimes necessary to restore default settings on DVR but usually not. You should be back in business. Tech should have cautioned you against hooking up an ethernet cable to your receivers.