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Activating and deactivating LEDs

You can use these procedures to activate or deactivate light-emitting diodes (LEDs) by using the management console or the Advanced System Management Interface (ASMI).

The system attention LED is activated when an error that requires a service action is detected, but a fault LED is not activated. Such errors can include errors that generate a system reference code (SRC) or a service request number (SRN). On systems that support fault LEDs, a fault LED is activated for many problems that can be isolated to a specific hardware component. However, for some problems that require a service action, a fault LED might not be activated even if a problem can be isolated to a specific hardware component. For those problems, the system attention LED is activated instead.

For IBM® Power Systems™ servers that contain the POWER7® processor, the LEDs can be used to identify or verify a part that you are servicing. The error and identify function (amber) LED indicates an error and corresponds to the location code in the system reference code (SRC). The LED is activated and deactivated automatically.

Additionally, the following procedures can also be used to activate and deactivate LEDs.
Parent topic: Common service procedures

Deactivating a system attention LED or partition LED by using the management console

You can deactivate a system attention LED or a logical partition LED if you decide that a problem is not a high priority and you decide to repair the problem at a later time. You can do this task from the Hardware Management Console (HMC) or the IBM Systems Director Management Console (SDMC).

If you want to be alerted if another problem occurs, you must deactivate the system attention LED so that it can be activated again if another problem occurs.
To deactivate a system attention LED by using the HMC, complete the following steps:
  1. In the navigation area, open Systems management.
  2. Select the server that you are working on.
  3. Open Operations > LED Status.
  4. Select View System Attention. The System attention LED window opens. The selected system and its LED state are displayed in the upper part of the window. The logical partition and its LED state are displayed in the lower part of the window. From the system attention LED window, you can deactivate both the System attention LED and the logical partition LED.
  5. Select Deactivate System Attention LED from the Action menu. A confirmation window is displayed that provides the following information:
    • A verification that the system attention LED was deactivated.
    • An indication that there still might be open problems within the system.
    • An indication that you cannot activate the system attention LED.
  6. Select one of the logical partitions in the lower table, and select Deactivate partition LED from the Partition Operations menu. A confirmation window is displayed that provides the following information:
    • A verification that the logical partition LED was deactivated.
    • An indication that there still might be open problems within the logical partition.
    • An indication that you cannot activate the logical partition LED.
To deactivate a system attention LED by using the SDMC, complete the following steps:
  1. On the Welcome page, under the Resources tab , select the server.
  2. Click Actions > Service and Support > Hardware > System Attention LED.
  3. Click OK.

Activating or deactivating an identify LED by using the management console

You can activate or deactivate an identify LED for components attached to the system from the Hardware Management Console (HMC) or from the IBM Systems Director Management Console (SDMC).

The system provides several LEDs that help identify various components in the system, such as enclosures or field-replaceable units (FRUs). For this reason, the LEDs are called identify LEDs.

You can activate or deactivate the following types of identify LEDs:
  • Identify LED for an enclosure. If you want to add an adapter to a specific drawer (enclosure), you need to know the machine type, model, and serial number (MTMS) of the drawer. To determine whether you have the correct MTMS for the drawer that needs the new adapter, you can activate the LED for a drawer and verify that the MTMS corresponds to the drawer that requires the new adapter.
  • Identify LED for a FRU associated with a specified enclosure. If you want to hook up a cable to a specific I/O adapter, you can activate the LED for the adapter, which is a field replaceable unit (FRU), and then physically check to see where you should connect the cable. This is especially useful when you have several adapters with open ports.
To activate or deactivate an identify LED for an enclosure or FRU by using the HMC, follow these steps:
  1. In the navigation area, open Systems management.
  2. Select the server you are working on.
  3. Click Operations > LED Status > Identify LED. The Identify LED, Select Enclosure window opens.
  4. To activate or deactivate an identify LED for an enclosure, select an enclosure from the table, and click either Activate LED or Deactivate LED. The associated LED is either turned on or off.
  5. To activate or deactivate an identify LED for a FRU, select an enclosure from the table, and then select Selected > List FRUs.
  6. Select one or more FRUs from the table, and click either Activate LED or Deactivate LED. The associated LED is either turned on or off.
To activate or deactivate an identify LED for an enclosure or FRU by using the SDMC, complete these steps:
  1. On the Welcome page, under the Resources tab , select the server.
  2. Click Actions > Service and Support > Hardware > Identify LED.
  3. To activate or deactivate an identify LED for an enclosure, select an enclosure from the table, and click either Activate LED or Deactivate LED. The associated LED is either turned on or off.
  4. To activate or deactivate an identify LED for a FRU, select an enclosure from the table, and then click List FRUs.
  5. Select one or more FRUs from the table, and then click either Activate LED or Deactivate LED. The associated LED is either turned on or off.

Deactivating a system attention LED or logical partition LED by using the Advanced System Management Interface

You can deactivate a system attention LED or a logical partition LED by using the Advanced System Management Interface (ASMI).

The system attention indicator provides a visual signal that the system as a whole requires attention or service. Each system has a single system attention indicator. When an event occurs that either needs your intervention or that of service and support, the system attention indicator lights continuously. The system attention indicator is turned on when an entry is made in the service processor error log. The error entry is transmitted to the system error log and to the operating system error log.

To perform this operation, your authority level must be one of the following levels:
  • Administrator
  • Authorized service provider

To turn off the system attention indicator, do the following steps:

  1. In the ASMI Welcome pane, specify your user ID and password, and click Log In.
  2. In the navigation area, expand System Configuration > Service Indicators > System Attention Indicator.
  3. In the right pane, click Turn off system attention indicator. If the attempt is unsuccessful, an error message is displayed.

Activating or deactivating an identify LED by using the Advanced System Management Interface

You can activate or deactivate an identify LED by using the Advanced System Management Interface (ASMI).

You can specify the location code of any indicator to view or modify its current state. If you provide the wrong location code, the advanced system manager attempts to go to the next higher level of the location code.

The next level is the base-level location code for that field replaceable unit (FRU). For example, a user types the location code for the FRU located on the second I/O slot of the third enclosure in the system. If the location code for the second I/O slot is incorrect (the FRU does not exist at this location), an attempt to set the indicator for the third enclosure is initiated. This process continues until a FRU is located or no other level is available.

To perform this operation, your authority level must be one of the following levels:
  • Administrator
  • Authorized service provider

To change the current state of an indicator, do the following steps:

  1. On the ASMI Welcome pane, specify your user ID and password, and click Log In.
  2. In the navigation area, expand System Configuration > Service Indicators > Indicators by Location code.
  3. In the right pane, enter the location code of the FRU and click Continue.
  4. Select the preferred state from the list.
  5. Click Save settings.

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Last updated: Fri, March 20, 2015