My Wifi router keeps losing its connection to the cable modem, and therefore I have no internet service. I connected the computer directly to the cable modem and all is fine - I have service. I confirmed with the ISP that internet service is working fine in my area. I've changed ethernet cables (now using the one that came in the box) thinking maybe the cable was bad. Same problem. It holds the connection for a few hours, and then just drops (the little "globe" icon on the router starts blinking - when I have connection, it is steady lit). The firmware seems to be current, as the upgrade option on the website is the same version as what the router is using. What's weird is, once I connect the computer directly to the modem, then change the cables back again (router to modem and router to computer), then it works again for a few hours, then drops again. If anyone has any ideas how to fix, I would be most appreciative as I have two mobile devices, three TVs and two computers that depend on it (not all at the same time!). Thank you in advance!
Wifi Router keeps disconnecting from the cable modem
Model: Archer C1900
Hardware Version: V1
Firmware Version: 3.17.0 Build 20151009 Rel.61423n