The battery may be functional on your laptop, however the charger or the power outlet that you are attempting to use may not be functional. If you are a surge protector move the switch to the on position. You can verify that the plug is working by plugging in another known working device such as a lamp into the power outlet to make sure that power is being supplied to the charger. This may also be an issue regarding the connection internally between the power connector and the electronics inside of the laptop or with the charger itself.