Everything was going good and suddenly my internet connection has gone. I thought the problem is from my ISP but looks like something is wrong with my router.  Now my WAN led always remain ON. even after I removed the Incoming LAN cable. I have restarted many times and also rebooted from 192.168.0.1. But nothing is working and WAN led still remains ON.

Can you please help me to fix this issue? is there anything wrong with Hardware?