I am not sure what is the status of your router based on this output but hopefully others with more experience can jump in and help.
Worse come to the worse, you can rewrite the memory of the router and save it but that is a last resort so please wait a bit for more experienced members to respond though don’t give up on the router as it is a great tool .
Hello @micky0867, I happened to be in a situation like yours, but the problem was caused only by me!
So I don’t know if yours is dead like forever, or not.
Surely, taking the problem from bottom up will tell you if the router is still recoverable.
If you can still connect with uart to the uboot console half of the long procedure is bypassable.
You can flash the two or three vital parts of the IC and see if it comes back to life.