A method and information handling system including a display device connector for connecting to a digital display device, a controller executing instructions of an impedance mismatch control system for determining impedance differences along an operative connection from the display device connector to the digital display device, where the controller receives a display device connector impedance measurement and a second impedance measurement from a point further along the operative connection between the display device connector and the digital display device, and the controller executes the impedance mismatch control system to determine an impedance mismatch exists from the impedance difference between the display device connector and the point further along the operative connection between the display device connector and the digital display device.