Try this. Try unplugging the laptop, remove the battery. Plug just the power cord back in and see if the laptop will boot up. If so then we know the charger is working. Then try unplugging the power cord again, hold the power button in for about 10 seconds, this discharges the system, then plug the battery and power cord back in. If the battery still doesn't charge after this, then you need to replace your battery.