Light path diagnostics LEDs
The following table describes the LEDs on the light path diagnostics panel and suggested actions to correct the detected problems.
Look at the light path diagnostics panel on the front of the server. Lit LEDs on the light path diagnostics panel indicate the type of error that has occurred. The light path diagnostics panel LEDs are visible through the bezel.
- Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved.
- If an action step is preceded by '(Trained technician only)', that step must be performed only by a Trained technician.
- Go to the IBM support website at the Lenovo Support Portal to check for technical information, hints, tips, and new device drivers or to submit a request for information.
LED | Description | Action |
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Hard disk drive/ RAID | A hard disk drive has failed or is missing. A SAS controller or a ServeRAID controller error has occurred. |
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Fan | A fan has failed, is operating too slowly, or has been removed. The TEMP LED might also be lit. |
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Temperature | The system temperature has exceeded a threshold level. A failing fan can cause the Temperature LED to be lit. |
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Microprocessor | When only the Microprocessor LED is lit, a microprocessor has failed. | If the Configuration LED is not lit, a microprocessor failure occurs, complete the following steps:
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Microprocessor + Configuration When both the Microprocessor and Configuration LEDs are lit, the microprocessor configuration is invalid. | If the Configuration LED and the Microprocessor LED are lit, the system issues an invalid microprocessor configuration error. Complete the following steps to correct the problem:
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Configuration | Configuration + Microprocessor A hardware configuration error has occurred. | If the Configuration LED and the Microprocessor LED are lit, complete the following steps to correct the problem:
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Configuration + Memory A hardware configuration error has occurred. | If the Configuration LED and the Memory LED are lit, check the system-event logs for information about the error (see Event logs). | |
Configuration + Power supply A hardware configuration error has occurred. | If the Configuration LED and the Power supply LED are lit, the system issues an invalid power configuration error. Make sure that both power supplies installed in the server are of the same rating or wattage. | |
Memory | When only the Memory LED is lit, a memory error has occurred. | Note Each time you install or remove a DIMM, you must disconnect the server from the power source; then, wait 10 seconds before restarting the server.
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Memory + Configuration When both the Memory and Configuration LEDs are lit, the memory configuration is invalid. | If the Memory LED and the Configuration LED are lit, check the system-event logs for information about the error (see Event logs). | |
Power supply | When only the Power supply LED is lit, a power supply has failed. | If the CONFIG LED is not lit, the system might detect a power supply error. Complete the following steps to correct the problem:
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Power supply + Configuration When both the Power supply and Configuration LEDs are lit, the power supply configuration is invalid. | If the PS LED and the CONFIG LED are lit, the system issues an invalid power configuration error. Make sure that both power supplies installed in the server are of the same rating or wattage. | |
Over spec | The power supplies are using more power than their maximum rating. | If the Over spec LED on the light path diagnostics panel is lit, complete the following steps in order until the problem is solved:
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PCI | An error has occurred on a PCI card or a PCI bus. |
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NMI | A nonmaskable interrupt has occurred, or the NMI button was pressed. |
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System board | An error has occurred on the system battery, the microprocessor 2 expansion board, the power paddle card, or the system board. |
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Look at the system service label on the top of the server, which gives an overview of internal components that correspond to the LEDs on the light path diagnostics panel. This information can often provide enough information to diagnose the error.