Repair your defective Optiplex GX520/GX620 front panel indicator lights and ports with this genuine Dell OEM replacement I/O PCA with Cable! 

Type: Front Panel I/O Indicator/Plug Cable Assembly Part Number: WC679 0WC679 CN-0WC679 w/R6187 0R6187 CN-0R6187 Bracket and N8420 0N8420 CN-0N8420 PCB 0P476 00P476 CN-00P476 PCA (compatible X8912)
Compatible Part Numbers: Compatible Models: Dell Optiplex GX520 Chopper and GX620 Vortex