Only old devices can connect to the internet

[lukah]

I'm using the zte 931vii
I have a weird issue where I reset my router and then all of the devices that were connected before the reset can connect normally but everything else after the reset cannot.
I recently had a couple of buddies over and one brought his laptop with him, he could detect the wifi but couldn't connect, not even through ethernet so I figured it must have been something with his machine.
But now my dad bought a laptop and my sister wanted his so I deleted all the files from the old laptop and put on new windows and now neither of them can connect, not even through ethernet.
I'm currently plugging the same exact ethernet cord from my pc which i'm writing this on, into my laptop and it's still not working. I don't know what info I should provide so if you need something please ask. Thanks in advance

 

[Ralston18]

What wireless standards are supported by your router?

Reference:

https://www.lifewire.com/wireless-standards-802-11a-802-11b-g-n-and-802-11ac-816553

Key concept being that the router and its connected devices (wired and wireless) have some agreement in place with respect to how they connect and communicate.

Older devices may work. Newer devices only if they are configured to use older protocols.

The reset probably undid some of those agreements by reverting to the default settings. The connecting devices do not know that and are still trying to use the previously agreed upon settings.

Get the router's User Guide/Manual out and log in to the router to see how it is configured.

Focus on getting one device to connect using the standards and protocols used by the router. Determine which configuration settings work.

Then go device by device until all again are in sync with respect to the standards and protocols.

Keep notes as you go for reference purposes.

 

[lukah]

No I do not mean old as in age I mean old as in theyve been connected before a certain period. Around 2 weeks ago I reseted my router and all of the previous devices that have been connected before the reset work completely as expected. The problem occurs when I want to connect devices after the reset has been done, they recognize the network but just don't want to connect (No internet connection) even when connecting the "new" devices with the exact same cable as the "old". http://imgur.com/a/qdSIB is what I have available for wifi but note that the "new" devices don't even have internet via an ethernet cable. I would understand if the issue was only through wifi but the problem still persists even by a wired connection.

 

[Ralston18]

Are the new devices using 802.11ac?

Can you configure them to 802.11n or 802.11g or 802.11b?

The other thought that occurs to me is that there may be a limit on the allowed number of DHCP devices.

Check the router setting(s). The established DHCP IP address range and/or some numerical limit on connected devices.

However, if that were fully true then if an "old" device is off then the IP address would be available for a "new" device.

And be sure that you do not have both the wired and wireless adapters enabled on any given device. Only one adapter should be enabled.

I mention that only because you wrote "exact same cable" with your screen shot being wireless options.