|Check your manual and see where the reset switch is located and try that. I don't know because you never gave the name and model of the laptop.|
Or just google that.
Try taking out the battery and just using the adapter, see if that works.
If that doesn't work, it sounds like your adapter is failing (even though there may be a light on it) so why not replace it? Put your laptop name and model number + battery into
and you will see that adapters are real inexpensive anymore.
Some HELP in posting on Computing.net plus free progs and instructions Cheers