Always attach an external device while your system and the device are turned off. Next, turn on any external devices before turning on the system (unless the documentation for the device specifies otherwise).

See "Using the System Setup Program" on page 41 for information about enabling, disabling, and configuring I/O ports and connectors.

Power Indicator Codes

The power button on the front panel controls the power to the system from the system's power supplies. The power indicator lights green when the system is on.

The indicators on the redundant power supplies show whether power is present or whether a power fault has occurred (see Figure 1-3). Table 1-3 lists the power supply indicator codes.

Table 1-3. Redundant Power Supply Indicators

Indicator

Function

 

 

Power supply status

Green indicates that the power supply is operational and

 

providing DC power to the system.

Power supply fault

Amber indicates a problem with the power supply.

AC line status

Green indicates that a valid AC source is connected to the

 

power supply and is operational.

 

 

About Your System

17

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Dell HR675 owner manual Power Indicator Codes, Redundant Power Supply Indicators Function, Providing DC power to the system