Let me start off by saying I don't know much about computers. I have checked all my cables and have determined that when the WIFI quits the cablr coming in is still OK. I can disconnect power from the modum for several hours and it will then work. If I power dowm for 2 or 3 minutes it doesn't help. Added a external fan because I thought it might be a heay related issue and that didn't help. I only have amazon fire TV, Lap top , and a phone. Usually when it quits there is only 1 device being used. I can't find anywhere the length of warranty. This unit was purchased 5/15/2018 and has been a probiem for several weeks now.
Re: NO WIFI
Has a factory reset been performed and setup from scratch?
What channels are you using? Auto? Try setting manual channel 1, 6 or 11 on 2.4Ghz and any unused channel on 5Ghz.
Any Wifi Neighbors near by? If so, how many?
My Setup (Cable 900Mbps/50Mbps)>CM1100>Orbi RBK50 v220.127.116.11 and Orbi RBK853 v18.104.22.168(Both Router Mode)
Additional NG HW: C7800/CM1100/CM1200, Orbi CBK40, Orbi RBK852, R7800, R7960P, EX7500/EX7700, XR450 and WNHDE111