Dell PowerEdge R720 and R720xd Owner's Manual

Diagnostic Indicators

The diagnostic indicators on the system front panel display error status during system startup.

NOTE: No diagnostic indicators are lit when the system is switched off. To start the system, plug it into a working power source and press the power button.

The following section describes system conditions and possible corrective actions associated with these indicators:

Health indicator

Condition: Corrective Action
If the system is on, and in good health, the indicator lights solid blue.: None required.
The indicator blinks amber if the system is on or in standby, and any error exists (for example, a failed fan or hard drive): See the System Event Log or system messages for the specific issue.; Invalid memory configurations can cause the system to halt at startup without any video output. See Getting Help.

Hard-drive indicator

Condition: Corrective Action
The indicator blinks amber if a hard drive experiences an error.: See the System Event Log to determine the hard drive that has an error. Run the appropriate Online Diagnostics test. Restart system and run embedded diagnostics (ePSA). If the hard drives are configured in a RAID array, restart the system and enter the host adapter configuration utility program.

Electrical indicator

Condition: Corrective Action
The indicator blinks amber if the system experiences an electrical error (for example, voltage out of range, or a failed power supply or voltage regulator).: See the System Event Log or system messages for the specific issue. If it is due to a problem with the power supply, check the LED on the power supply. Re-seat the power supply by removing and reinstalling it. If the problem persists, see Getting Help.

Temperature indicator

Condition

Corrective Action

The indicator blinks amber if the system experiences a thermal error (for example, a temperature out of range or fan failure).

Ensure that none of the following conditions exist:

A cooling fan is removed or has failed.
System cover, cooling shroud, EMI filler panel, memory-module blank, or back-filler bracket is removed.
Ambient temperature is too high.
External airflow is obstructed.

See Getting Help .

Memory indicator

Condition: Corrective Action
The indicator blinks amber if a memory error occurs.: See the system event log or system messages for the location of the failed memory. Reinstall the memory device. If the problem persists, see Getting Help .

PCIe indicator

Condition: Corrective Action
The indicator blinks amber if a PCIe card experiences an error.: Restart the system. Update any required drivers for the PCIe card. Re-install the card. If the problem persists, see Getting Help.