An input/output device used for connecting at least one external wire with a display apparatus, comprises a case, at least one I/O connector, a flip cover, and a lighting device. The case embedded in the case of the display apparatus has a wiring slot to provide the wire passing through the case. The I/O connectors embedded on the case are electrically connected to the display apparatus. The flip cover is pivoted on the case. The lighting device having a light source and a switch is associated with the flip cover to turn on or turn off the light source.