+ 0 Votes Check router mjd420nova June 18, 2013 at 12:53am PST Yes, first check with an ethernet CAT5 cable to the first wired port on the router. If things still fail, move the CAT5 cable directly to the modem ethernet port. Any faults there are the modems failure, not the router. Many environmental changes can affect WIFI reception, moving furniture, even a recent installation of a neighbors router is interfering. Try downloading and running inSSIDer, that will let you see all routers in range and show a channel lineup to see which if any are interfering.