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I've started having some weird things happen with my network a couple months ago. Sometimes when I get home, and turn on my PC, it will show that it does not have internet connection.
EDIT
My PC (A) and PS4 (B) sit on a table across the room. When the above happens, both devices don't have network connection. They are connected to a small 5 port switcher. That switcher is connected to the RT_AC88U. All that is a wired connection. I have several other devices that are directly connected to the router via network cable. Those devices seem to be working normally.
I'll try to login to my router with my PC and it acts as if the cable is disconnected. The workaround is to ....
1. Turn off my RT-AC88U.
2. Disconnect all the network cables in back. I'm using 6 of the 8 wired ports in back.
3. Leave the cable that goes to my PC and PS4 connected. That in turn goes to a small 5 port switcher. Which connects to my PC and PS4.
4. Turn on the RT-AC88U.
5. The RT-AC88U will boot up.
6. Restart computer/or log out computer then back on. Then my PC can connect to the router and internet normally.
7. I plug back in the rest of the network cables in back. All the other devices connect normally.
8. All is fine for now.
But if I leave for the day. Then this issue may occur again.
Otherwise my internet connection, through my network works great.
Any suggestions as to how to fix this?
How To Factory Reset Asus Router
I've had an RT-AC88U for a couple of years. Last year, the web interface stopped working correctly. I did the hard connection and loaded the firmware from a hard drive and reset the modem but still the same problem. Multiple attempts to resolve. Cannot change any settings, screens are not displaying properly, shows no devices connected even though I am accessing the interface through a connected device.
ASUS support is terrible. Generally have to wait 2-3 days for a response, and often you have to follow up. No phone support - email only. Only solution offered is to send the unit back at cost and then they will assess it and advise cost to fix. Not a very attractive proposition. More cost effective to just buy a new unit - but it would not be an ASUS again. Following on from a bad experience with quality and support on an ASUS laptop, this is my last ASUS purchase.
Contrast this with a competitive product I am now using which has 7 days phone technical support, and you can actually speak to someone who has the capability and desire to help.
As another member of this forum posted, don't buy this router because if the GUI stops working, your screwed.