Solved! Go to Solution.
Sorry to be the bearer of Bad news but it seems you need to get yourself another phone. Only thing you can try is get the device inspected by another Nokia Care if you have nearby and see what they say.
I had a similar experience with my Nokia 6110 Navigator. It had fallen from a height of just about 30 cms and went dead. Was told that the Motherboard has cracked and the phone is beyond repair (economically not viable)..