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Power on and power off problems

Use this information to resolve issues when powering on or powering off the node.

Note

Node does not power on​

Complete the following steps until the problem is resolved:
Note
The power button will not function until approximately five to ten seconds after the node has been connected to power to allow the BMC to complete initialization.

  1. Perform physical reseat or virtual reseat. Then, power on the node.

    • Physical reseat: remove the tray from the enclosure. Then, reinstall the tray back to the enclosure.

    • Virtual reseat: access SMM3 via Web GUI or IPMI commands to perform virtual reseat

  2. Make sure that both Power Conversion Stations installed in the enclosure are of the same type. Mixing different Power Conversion Stations in the server will cause a system error (the system-error LED on the front operator panel turns on).

  3. Make sure that:

    • The tray is installed correctly to the enclosure. See SC777 V4 user guideSee Install a tray to the enclosure.

    • The type of memory that is installed is correct and the installation rules are met.

    • The DIMMs are fully seated with lock latches fully closed.

    • The LEDs on the Power Conversion Station do not indicate a problem. See Power Conversion Station (PCS) LEDs.

    • The processors are installed in the correct sequence.

  4. If you just installed an optional device, remove it, and restart the server. If the server now starts, you might have installed more devices than the Power Conversion Station supports.

  5. Implement the minimum configuration to check whether any specific components lock the power permission. Minimum configuration is as below:

    • One N1380 enclosure

    • One SC750 V4 tray

    • Two 32GB 2Rx8 DDR5 RDIMM per node in slot 7 and slot 18. (one DIMM per processor)

    • Three 15000W Power Conversion Stations (PCS)

    • One drive (any type) (If OS is needed for debugging)

    • One N1380 enclosure

    • One SC777 V4 tray

    • One GB200-NVL4 board

    • Two SOCAMM memory

    • Two 15000W Power Conversion Stations (PCS)

    • One drive (any type) (If OS is needed for debugging)

  6. Collect the failure information by capturing the system logs and provide it to Lenovo support.

Node does not power off​

Complete the following steps until the problem is resolved:

  1. Determine whether you are using an Advanced Configuration and Power Interface (ACPI) or a non-ACPI operating system. If you are using a non-ACPI operating system, complete the following steps:

    1. Press Ctrl+Alt+Delete.

    2. Turn off the server by pressing the power button and holding it down for 5 seconds.

    3. Restart the server.

    4. If the server fails POST and the power button does not work, disconnect the power cord for 20 seconds; then, reconnect the power cord and restart the server.

  2. If the problem remains or if you are using an ACPI-aware operating system, suspect the system board (system board assembly).