PC WAN connection problem.?

i have a WAN connection to my PC, and up until recently it has worked perfectly, the LED light on my cable has always been green and i haven't had any issues, But suddenly it just stopped working, the LED light is orange and anytime i turn on my PC, microsoft edge pops up in the router login page, when i login in the WAN status page it shows a disconnected status with the following suggestion "Please.check the hardware connection of the WAN port". Is there a problem with my cable, motherboard, router or modem? What should i do?

P.S. the internet in the rest of the house works just fine wireless and WAN it just doesn't work on my PC. i have a tenda router.