Arris cm 820a cable modem to netgear ac1900 router. My internet connection sparatically goes out for all devices on my network both wired and wireless. So far the most reliable fix is to unplug the modems Ethernet cable from the router then plug it directly into my PC, this gets internet back up on that PC, I then undo/redo the Ethernet cable and I am back in business. Any ideas on what is going on? Realigning the on/off switches doesn't fix it. Just swapping the Ethernet cable. I have tried replacing the cable (twice). Don't know if it's a setting issue or my router just failing...hoping for settings.