Hi Arun,
I come to know while cheking other threads in this forum, this is very common problem with this handset. And the only option is to get the phone board replaced, which is costing 6000/-. My only regret is, when this was a known fact to my service center person, why he has kept me in dark and charged 2200/- for replacing the battery and some servicing apart from software updation, while that was not a problem due to battery.
Let me know, if there is another solution for this problem.
Thanks