Lenovo 3823, 3821, 3822, 3719 manual System-board internal connectors

ac-power LED: Each hot-swap power supply has an ac-power LED and a dc-power LED. When the ac-power LED is lit, it indicates that sufficient power is coming into the power supply through the power cord. During typical operation, both the ac and dc-power LEDs are lit. For any other combination of LEDs, see “Power-supply LEDs” on page 139.

Video connector: Connect a monitor to this connector.

Serial 1 connector (COMM 1): Connect a 9-pin serial device to this connector. The serial port is shared with the integrated management module (IMM). The IMM can take control of the shared serial port to perform text console redirection and to redirect serial traffic, using Serial over LAN (SOL).

Systems-management connector: Use this connector to connect the server to a network for systems-management information control. This connector is used only by the IMM.

System-board internal connectors

The following illustrations show the internal connectors and switches on the system board.

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Chapter 6. Locating Server Controls and connectors 131