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Ifthe cell phone battery is more than 3 - 4 years old then the battery could be wornout. Rechargeable batteries have a finite number of charge and discharge cyclesand will lose their charge capacity over time, i.e. won't charge to 100% andgradually the charge reduces until the battery won't charge up atall.
ORThe battery shows a 100% charge but when the adapter is disconnected thebattery drops off to zero capacity in a very short time.
Ifthe battery drops to an unacceptable charge level then the battery needs to bereplaced.
Your firmware seems to have got corrupted. get it re-installed. Do not do it yourself. What happens is that when you do it over the net, only the corrupted files are replaced. If you get it done from Noia Care, the have the download of the whole SW. Over 200 MB of download in total. The install is full and total. It takes about half an hour.
ok man,.. it's a hardware failure,, can't fix it here,. ur fone is grounded need repair your keypad module, some capacitors are busted so there is no switching point to control the lights .. go to service center...