The Dell Alienware X51 Area 51 Left I/O Lighting Circuit Board with Cable (part number W691V) is an authentic replacement component designed for the Alienware X51 and Area 51 gaming desktops. This circuit board is responsible for the I/O lighting on the left side of the system, enhancing the visual appeal and gaming atmosphere with customizable lighting effects. The included cable ensures easy and seamless installation, restoring the aesthetic functionality of your Alienware system. Ideal for maintaining or upgrading your gaming setup, this genuine Dell part guarantees compatibility and optimal performance.