A basic component incorporated in a computer is a power supply unit that functions to receive alternating current (AC) electrical power from an external source and transform the received power to a relatively low direct current (DC) voltage that may be fed to various electronic components. The switching power supply transforms the local electrical power and provides the computer system with a proper operational voltage. The switching power supply also distributes the electrical power to sub systems of the computer requiring different voltage levels. The electrical power used in a computer system is a direct current with a voltage usually under 12 Volts. A computer is generally provided with input/output (I/O) ports including a power supply conductor for powering peripheral devices connected to such ports.