Pixie, I had the same problem with a new Acer Aspire as well (right after receiving it back from Acer for a different problem. The last thing I wanted to do was send it back to them again). After troubleshooting, battery, etc. I reported the problem to Acer (it was under warranty at the time) and insisted they send me a new AC Adapter. Instead they sent me a "partial" AC Adapter, the part that goes from the adapter to the computer (they did not include the cord that plugs the adapter into the wall.) So now I had 2 adapter-to-computer parts and 1 wall cord. What I discovered was that if the one of the adapter-to-computer was plugged in and the power was interrupted for whatever reason while the laptop was on, that the laptop would NOT recognize that same adapter when it was turned on again or replugged in. However I found when I switched the adapter-to-computer parts, the laptop WOULD recognize the power and charge again. I suspect this may have something to do with the BIOS recognizing the hardware or something but prefer not to mess with that. In any case, this works so I just keep both adapters handy. If the power is interrupted I can just switch the adapter-to-computer parts for good to go.