try unplugging the laptop, any USB or other things pluged into it and remove the battery. wait for about 5 - 10 minutes for the laptop to lose its charge then plug the battery back in and the power plug back in. turn it on again. Then plug the other stuff back in.
This worked on an old laptop of mine. The main point above is to unplug power source (even Ipods) and leave the computer to loss it's charge.