Hello @micky0867, I happened to be in a situation like yours, but the problem was caused only by me! :sweat_smile:
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.