I have the same issue, Roku 3 worked fine on ethernet connected directly to ActionTec C1000a DSL modem/router. "Upgraded" network putting ActionTec in transparent bridge mode, added Asus RT-ACRH 13 router going through a D-Link switch. Everything thing else works perfectly, getting signal, laptop will connect on line going to Roku, tried factory reset, reset connections, etc - so far no joy. Would upgrade if I thought it would work with another Roku, but sounds like new models have same issues.