Blade server light path diagnostics LEDs

Use this information to diagnose and resolve possible errors displayed by the light path diagnostic LEDs.

The following table describes the LEDs on the light path diagnostics panels, on the system board, and on the optional expansion unit and suggested actions to correct the detected problems.

  • Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved.
  • See Parts listing to determine which components are consumable, structural, or CRU parts.
  • If an action step is preceded by "(Trained technician only)," that step must be performed only by a trained technician.
Lit light path diagnostics LED Description Action
None An error has occurred and cannot be isolated, or the service processor has failed.
  1. Make sure that the light path diagnostics LED is lit, to ensure that there is enough power in the blade server to light the rest of the LEDs. See Viewing the light path diagnostics LEDs in the blade server.
  2. Check the BMC log for information about an error that is not represented by a light path diagnostics LED. See Using the Setup utility.
Battery error The system battery is not installed or is not working.
  1. Reseat the battery. See Removing the battery and Installing the battery.
  2. Replace the battery. See Removing the battery and Installing the battery.
CPU MIS Microprocessor mismatch. Make sure that microprocessors 1 and 2 are identical (number of cores, cache size and type, clock speed, internal and external clock frequencies).
  1. Verify the type of microprocessors installed by using the Configuration/Setup utility. See Using the Setup utility.
  2. (Trained technician only) Replace microprocessor 2 with an identical microprocessor to microprocessor 1. See Removing a microprocessor and heat sink and Installing a microprocessor and heat sink.
DIMM x error A memory error occurred. Look for system-event and IMM2/AMM logs related to memory and resolve those events (see IMM error messages and POST/UEFI diagnostic codes).
Expansion card error An error has occurred with the expansion card.
  1. Verify that you have the latest system firmware (see Updating firmware and device drivers).
  2. Check the event logs for other related error messages (see Event logs).
  3. Reseat the expansion card (see Removing an I/O expansion card and Installing an I/O expansion card).
  4. Replace the expansion card (see Removing an I/O expansion card and Installing an I/O expansion card).
Front panel missing error The front control panel is not installed.
  1. Check that the control panel is installed.
  2. Check that the control panel cable is connected into the connector on the system board (see Installing the control panel).
  3. Reseat the front control panel (see Removing the control panel and Installing the control panel).
INTERNAL LP A component error has occurred.
  1. Remove the cover from the blade server (see Removing the blade server cover).
  2. Press and hold the power button to light the error LEDs on the system board.
  3. Look for system-event and IMM2/AMM logs related to the component and resolve those events (see IMM error messages and POST/UEFI diagnostic codes)
LP ACTIVE The system board light path LEDs have power. Check for error LEDs that are lit on the system board. If this LED fails to light, install the blade server in a chassis for approximately 2 hours to enable the light path diagnostics panel to charge.
Microprocessor error The microprocessor has failed or overheated, or the start microprocessor is missing.
  1. Check the Integrated Management Module II (IMM2) log for more information. See Viewing event logs through the Setup utility.
  2. If the log shows that a microprocessor is disabled or that a microprocessor error has occurred, perform one of the following actions:
    1. (Trained technician only) Reseat the microprocessor that is indicated by the lit LED. See Removing a microprocessor and heat sink and Installing a microprocessor and heat sink.
    2. (Trained technician only) Replace the microprocessor that is indicated by the lit LED. See Removing a microprocessor and heat sink and Installing a microprocessor and heat sink.
NMI (NMI error) The system board has failed.
  1. Replace the blade server cover, reinsert the blade server in the BladeCenter unit, and then restart the blade server. Check the BMC log for information about the error. See Using the Setup utility.
  2. (Trained technician only) Replace the system-board assembly. See Removing the system-board assembly and Installing the system-board assembly.
SAS storage drive error A storage drive has failed. Run the SAS Attached Disk diagnostic test. If the drives passes diagnostics but continues to have a problem, replace the storage drive with a new one. See IBM Dynamic System Analysis Preboot diagnostic program.
SYS BOARD The system board has failed (Trained technician only) Replace the system-board assembly. See Removing the system-board assembly and Installing the system-board assembly.
TEMP (Over temperature error) The system temperature has exceeded a threshold level.
  1. Check the function of the shared BladeCenter unit resources. See Solving shared BladeCenter resource problems.
  2. Make sure the air vents are not blocked and that all blade bays in the BladeCenter unit have a blade server or a blade filler installed.
  3. Make sure that the room temperature is not too high. See Features and specifications for temperature information.
Parent topic: Light path diagnostics