my dell vostro 1520 crashed while i was installing drivers of windows 7 64bit. when i tried to update the bios it suddenly hanged. it remained in that state for a long time and was not getting off even by pressing and holding the power button. i removed the battery and after again installing the battery laptop is not giving any display of startup and all the caps lock lights are blinking. what the problem is this. i am worry about my laptop. please tell me the solution