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#### Interpreting Diagnostic LEDs

Use the following diagnostic LEDs to determine if a component has failed in the server.

Table 11 Interpreting Diagnostic LEDs

Type of LEDs | LED Location | Links
--- | --- | ---
Server-level LEDs | On the front and rear of the server | Front Panel System Controls and LEDs Rear I/O Module LEDs
Component-level LEDs | On each individual component | Processor Module LEDs Hard Drive LEDs Power Supply and AC Power Connector LEDs Fan Module LED Main Module Motherboard LEDs

##### Front Panel System Controls and LEDs

The system status is represented by six LEDs on the front panel. These LEDs are shown in the following figure and described in the table that follows the figure.

Table 12 Front Panel System Controls and LEDs

No. | LED | Icon | Description
--- | --- | --- | ---
1 | System Locator LED and button(white) |  | The Locator LED can be turned on to identify a particular system. When on, it blinks rapidly. There are two methods for turning a Locator LED on: Issuing the Oracle ILOM command `set /SYS/LOCATE value=Fast_Blink` Pressing the Locator button.
2 | System Service Required LED(amber) |  | Indicates that service is required. POST and Oracle ILOM are two diagnostics tools that can detect a fault or failure resulting in this indication. The Oracle ILOM `show faulty` command provides details about any faults that cause this indicator to light. Under some fault conditions, individual component fault LEDs are turned on in addition to the Service Required LED.
3 | System Power OK LED(green) |  | Indicates the following conditions: Off – System is not running in its normal state. System power might be off. The SP might be running. Steady on – System is powered on and is running in its normal operating state. No service actions are required. Fast blink – System is running in standby mode and can be quickly returned to full function. Slow blink – A normal but transitory activity is taking place. Slow blinking might indicate that system diagnostics are running or that the system is booting.
4 | System Power button |  | The recessed Power button toggles the system on or off. Press once to turn the system on. Press once to shut the system down in a normal manner. Press and hold for 4 seconds to perform an emergency shutdown.
5 | System Overtemp LED(amber) |  | Provides the following operational temperature indications: Off – Indicates a steady state, no service action is required. Steady on – Indicates that a temperature failure event has been acknowledged and a service action is required.
6 | Rear Fan Module Fault LED(amber) | REAR FAN | Provides the following operational fan module indications: Off – Indicates a steady state, no service action is required. Steady on – Indicates that a fan module failure event has been acknowledged and a service action is required on at least one of the fan modules.
7 | Rear Express Module Fault LED(amber) | REAR EM | Provides the following operational express module indications: Off – Indicates a steady state, no service action is required. Steady on – Indicates that a failure event has been acknowledged and a service action is required on at least one of the express modules.

##### Rear I/O Module LEDs

The rear I/O module has several LEDs, some of which give system status information, while others provide link information on the NET and QSFP ports. These LEDs are shown in the following figure and described in the table that follows the figure.

Table 13 Rear Panel Controls and LEDs

No. | LED | Icon | Description
--- | --- | --- | ---
1 | System Locator LED and button(white) |  | The Locator LED can be turned on to identify a particular system. When on, it blinks rapidly. There are two methods for turning a Locator LED on: Issuing the Oracle ILOM command `set /SYS/LOCATE value=Fast_Blink` Pressing the Locator button
2 | System Service Required LED(amber) |  | Indicates that service is required. POST and Oracle ILOM are two diagnostic tools that can detect a fault or failure resulting in this indication. The Oracle ILOM `show faulty` command provides details about any faults that cause this indicator to light. Under some fault conditions, individual component fault LEDs are turned on in addition to the Service Required LED.
3 | System Power OK LED(green) |  | Indicates the following conditions: Off – System is not running in its normal state. System power might be off. The SP might be running. Steady on – System is powered on and is running in its normal operating state. No service actions are required. Fast blink – System is running in standby mode and can be quickly returned to full function. Slow blink – A normal but transitory activity is taking place. Slow blinking might indicate that system diagnostics are running or that the system is booting.
4 | SP LED | SP | Indicates the following conditions: Off – Indicates the AC power might have been connected to the power supplies. Steady on, green – SP is running in its normal operating state. No service actions are required. Blink, green – SP is initializing the Oracle ILOM firmware. Steady on, amber – A SP error has occurred and service is required.
5 | System Overtemp LED(amber) |  | Provides the following operational temperature indications: Off – Indicates a steady state, no service action is required. Steady on – Indicates that a temperature failure event has been acknowledged and a service action is required.
6 | Net Management Link and Activity (green) |  | Indicates the following conditions: On or blinking – A link is established. Off – No link is established.
7 | Net Management Speed (green) |  | Indicates the following conditions: On or blinking – The link is operating as a 100-Mbps connection. Off – The link is operating as a 10-Mbps connection.
8 | NET Speed (amber/green) |  | Indicates the following conditions: Green on – The link is operating as a Gigabit connection (1000 Mbps). Amber on – The link is operating as a 100-Mbps connection. Off – The link is operating as a 10-Mbps connection or there is no link.
9 | NET Link and Activity (green) |  | Indicates the following conditions: Blinking – A link is established. Off – No link is established.
10 | QSFP Link and Activity (green) |  | Indicates the following conditions: Blinking – A link is established. Off – No link is established.

##### Related Information

- Processor Module LEDs

- Hard Drive LEDs

- Power Supply and AC Power Connector LEDs

- Fan Module LED

- Main Module Motherboard LEDs

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