Nokia 6300 screen problem

Hello guys, when i turned on my nokia6300 it shows me nokia screen and one second vibration. when i put charger or cable to connect to computer its wont work.charging black and white screen no charging and when i connect to cable from my computer so its on again as say nokia one second vibrate and start blinking and its gets off.

please help.

Hello , your mobile software is corrupted. you must flash it. it needs to be reinstalled. but i don't know how it can be done.

You have serious software problem...its about your firmware ...go to nokia care or any mobile service point than flash your mobile.