Lenovo 7Y54, Maintenance Manual

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• All banks of memory are enabled. The server might have automatically disabled a memory bank when
it detected a problem, or a memory bank might have been manually disabled.
• There is no memory mismatch when the server is at the minimum memory configuration.
2. Reseat the DIMMs, and then restart the server.
3. Check the POST error log:
• If a memory module was disabled by a systems-management interrupt (SMI), replace the memory
module.
• If a memory module was disabled by the user or by POST, reseat the memory module; then, run the
Setup Utility and enable the memory module.
4. Run memory diagnostics. When you start a solution and press the key according to the on-screen
instructions, the LXPM interface is displayed by default. (For more information, see the “Startup” section
in the LXPM documentation compatible with your server at
https://sysmgt.lenovofiles.com/help/topic/
lxpm_frontend/lxpm_product_page.html
.) You can perform memory diagnostics from this interface. From
the Diagnostic page, click
Run Diagnostic
➙
Memory test
.
5. Re-enable all memory modules using the Setup Utility, and then restart the server.
6. (Trained technician only) Install the failing memory module into a memory module connector for
processor 2 (if installed) to verify that the problem is not the processor or the memory module connector.
7. (Trained technician only) Replace the system board.
Invalid memory population detected
If this warning message appears, complete the following steps:
Invalid memory population (unsupported DIMM population) detected. Please verify memory configuration is valid.
1. See “Memory module installation order” in
Setup Guide
to make sure the present memory module
population sequence is supported.
2. If the present sequence is indeed supported, see if any of the modules is displayed as “disabled” in
Setup Utility.
3. Reseat the module that is displayed as “disabled,” and reboot the system.
4. If the problem persists, replace the memory module.
Hard disk drive problems
Use this information to resolve issues related to the hard disk drives.
• “Server cannot recognize a hard drive” on page 104
• “Multiple hard drives fail” on page 105
• “Multiple hard drives are offline” on page 105
• “A replacement hard disk drive does not rebuild” on page 106
• “Green hard disk drive activity LED does not represent actual state of associated drive” on page 106
• “Yellow hard disk drive status LED does not represent actual state of associated drive” on page 106
Server cannot recognize a hard drive
Complete the following steps until the problem is solved.
1. Observe the associated yellow hard disk drive status LED. If the LED is lit, it indicates a drive fault.
2. If the LED is lit, remove the drive from the bay, wait 45 seconds, and reinsert the drive, making sure that
the drive assembly connects to the hard disk drive backplane.
3. Observe the associated green hard disk drive activity LED and the yellow status LED:
104
ThinkSystem SR150 Maintenance Manual