Posted 14 October 2010 - 01:05 PM
If the system is saying that it does not recognize the power supply and won't charge the battery when you are using it, it is most likely because the power brick is not supplying enough power. So it is probably on it's way out. If you leave it plugged in and powered off it *should* charge the battery. It is just not providing enough juice to do both, power the laptop and charge the battery.
So you should start looking for a replacement.