Chapter 2: Installation 2-3 LED Descriptions and Pin Definitions #2. Activity LED Indicator Activity LED (marked #2 above), lo- cated on the card, indicates the func- tionality and activity of the card. The blinking of the Activity LED indicates that the add-on card is active. See the table on the right for details. #3. Processor Reset LED The LED will blink for a fraction of a second when the BMC card is reset. You can see this LED flash when you plug the power cable in. 2-4 Block Diagram 2-3 Activity LED Indicator Table Activity LED (D1) On (Blinking) Card is active Off Card is not active IPMI Connectors UART Interface (SOL) RENESAS H8S Supermicro Featured GPIO LPC Interface