wiggle the cord. serious. i used to have this 'surge protector' that was between the psu brick and the cord to the electrical outlet. one day i plugged the charger into the laptop..and... nothing. i couldnt figure it out. i tried many different things.. but nothing. then by some luck, i removed that dinky surge protector thing and it worked. needless to say i tossed that thing into the trash. i doubt it was actually doing anything anyway. it was just a little piece of plastic with an orange led on it =/