Few days ago I pressed the start up button, LEDs of charger, battery, WiFi, hard disk lighted up and it just shut downed without turning on screen. I plugged out charger and reinserted battery and it started fine and after I was able to use it normally. Yesterday same thing happened, I reinserted battery again and it won't start. When I plug in charger, charger LED is on and battery LED indicator blinks after 3 seconds. I don't know what it means but when I remove battery and turn on with charger it start ups, inserting battery makes it shutdown. Any idea whats wrong?