Originally Posted by MindoverMaster
That really does not help us at all. Does it run off the AC? If it does, it is nothing to do with the plug. If not, you may have to resoder the connector to the board.
Wait, what? lol
If a laptop runs off of AC... it's plugged in lol.
@luke: If the cable is fine (i.e. charges another computer / outputs the correct values as far as volts/amps), then the port is probably bad on the laptop. Does the port feel loose on when the charger is plugged in?
Since they're your school's laptops... I wouldn't try messing with them... just take them to your IT department, and they will either send them in for warranty, or will fix them themselves.