Often this can be due to a tripped GFI (think about the small button on your home plug-ins that sometimes flip if something too powerful is plugged in). This is a safety precaution to make sure you don't start a fire or blow the fuse. The sump pump may also have one of these GFI's depending on the type and model. This could be located on the sump pump or on the cord or outlet it is connected to. If resetting this GFI does not restore function to your system, please call our office so we can have one of our techs come and look at it.