@Sunshine 

  @zageng 

is there a solution for that?

  @Sunshine 

I have already inserted the dns but the wifi get disconnected that way when I click on the network icon it says connect that mean it has lost the ip connection between router

and btw it is not only two devices I face that on mobile also It is connected and disconnected without internet and when I restart the issue is partially resolved

the other problem is that this issue doesn't happen all day 

I wish to know the issue to solve it

I have already inserted the dns manually to see

  @Sunshine 

Hi I just bought TP Link TL-840N about a month ago and this issue is happening since the first time I use it.

The connection keeps getting disconnected very frequently. I have to restart the modem to make it work for only about 5 minutes, then it gets disconnected again. What I mean by disconnected is losing the internet connection. The device to the wifi is still connected, but the wifi doesn't connect to the internet.

Points from my efforts:

1. Using the LAN cable directly to my laptop is working fine and the internet is stable all the time. So I believe it's not the internet provider problem.
2. The internet disconnected happens on ALL devices: 1 laptop, 2 phones, and 1 tablet. So I believe it's not a device problem.
3. I have updated the firmware to the latest (as per 20 Nov 2023, 0.9.1 4.19 v0001.0 Build 221117 Rel.32743n)
4. I have googled and search on youtube people are trying many configurations. I tried also all:
   • Changing the channel from Auto to other (channel 1, channel 5)
   • Changing Mode from 11bgn mixed to 11bg mixed
   • Changing DNS Server from 0.0.0.0 to 8.8.8.8
   • Changing Secondary DNS Server to 8.8.4.4
   • I put a Reboot schedule every 2 hours, there's a video saying the router must be rebooted every once in a few hours to prevent internet disconnected.

And the issue persists. 

I am currently looking for buying a new router if this doesn't get resolved in 1 or 2 days.