It occurs to me that the 2nd router may be providing DHCP service faster than the main router so make sure you disconnect the connection to the other router. Also verify that the connection from the main router to the secondary router goes to its WAN port.
Do you know how to set the IP address on your PC to 192.168.1.2 ?
Mask 255.255.255.0
Default Gateway 192.168.1.1
https://pureinfotech...ess-windows-10/
That should allow you to access the router. regardless of who is providing DHCP service. Then I would check to make sure it is set to Dynamic IP and that it is not in bridge mode and that it is providing DHCP service? Perhaps reset the router when you first start.
Actually if you disconnect the router from the modem and then disconnect and reconnect the connection to the PC if the DHCP is working it should assign the PC an address in the 192.168.1.x range without needing to go to Static IP. (I would disconnect all other connections to make sure there is no bogus source of DHCP)
You can check by opening an elevated command prompt
http://www.howtogeek...-in-windows-10/
(If you open an elevated Command Prompt properly it will say Administrator: Command Prompt in the margin at the top of the window)
Then type:
ipconfig
and hit Enter
You will get something like:
Windows IP Configuration
Ethernet adapter Ethernet:
Connection-specific DNS Suffix . :
IPv4 Address. . . . . . . . . . . : 192.168.1.112
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.1.1
C:\Windows\system32>
IF the IP address is not 192.168.1.x then the DHCP on the router is not working. For more info type:
ipconfig /all
You will get a bunch of IPv6 stuff but the critical part is:
Ethernet adapter Ethernet:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek PCIe GbE Family Controller
Physical Address. . . . . . . . . : 44-8A-5B-C0-D8-C7
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IPv4 Address. . . . . . . . . . . : 192.168.1.112(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Sunday, May 17, 2020 10:22:44 PM
Lease Expires . . . . . . . . . . : Thursday, May 21, 2020 1:22:43 PM
Default Gateway . . . . . . . . . : 192.168.1.1
DHCP Server . . . . . . . . . . . : 192.168.1.1
DNS Servers . . . . . . . . . . . : 192.168.1.1
NetBIOS over Tcpip. . . . . . . . : Enabled
IF the router is providing DHCP then its address will be found after DHCP Server.