I've been using the router via Wifi for few months and it's been working fine. I also have Xbox One X connected via LAN which works but I recently connected my HTPC to it and it does not work. I just get error "Unidentified Network - No internet". At first I thougth it was issue with LAN card so I updated all drives and it was the same issue. Then I connected my laptop which showed similar behaviour.
I restarted my router and it started working fine but once the computer is restarted or it goes to sleep, same thing starts happening until the router is restarted. I installed a customer firmware and same issue. Then I installed DomaOS which worked intially but after a day same thing is happening.
Does anyone have any advise on what could be wrong? I'm out of my return period otherwise I would have just returned the router.
Try a factory reset and set up from scratch.
Swap LAN cabling between PC and router. CAT6 is recommended.
Whats the Mfr and model# of the ISP modem the router is connected too?
Try loading Stock FW and see.