Problems connecting to a Netgear WNR2000

I have a main router in the main house network 1 let’s say and in the guest house I have a second router connected via switch.

While moving stuff in the guest house I unplugged router 2 plugged it back in about 6 minutes later.

No device was able to connect I did an IP config and a nslookup the dns server address comes back ffff I thought it might be a DHCP issue. But I can’t get into the routers settings I can get into the main routers no problem the guest router just never loads I thought maybe use ethernet that still don’t work no connection can’t get to the settings page.