Lenovo 7D2V, Maintenance Manual

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Multiple rows of DIMMs in a branch identified as failing
1. Reseat the DIMMs; then, restart the server.
2. Remove the lowest-numbered DIMM pair of those that are identified and replace it with an identical
known good DIMM; then, restart the server. Repeat as necessary. If the failures continue after all
identified DIMMs are replaced, go to step 4.
3. Return the removed DIMMs, one at a time, to their original connectors, restarting the server after each
DIMM, until a DIMM fails. Replace each failing DIMM with an identical known good DIMM, restarting the
server after each DIMM replacement. Repeat step 3 until you have tested all removed DIMMs.
4. Replace the lowest-numbered DIMM of those identified; then, restart the server. Repeat as necessary.
5. Reverse the DIMMs between the channels (of the same processor), and then restart the server. If the
problem is related to a DIMM, replace the failing DIMM.
6. Swap processors to see if the memory issue followed by the processors or DIMMs. If it follows the failing
components, then replace the failing components.
7. (Trained technician only) Replace the system board.
DIMM PFA issue
1. Update the UEFI and XCC firmware to the latest version.
2. Reseat the failing DIMMs.
3. Swap processors and make sure that there are no damages to processor socket pins.
4. (Train service only) Ensure there is no abnormal material in any DIMM slot.
5. Run the memory module diagnostics. When you start a server and press F1, the Lenovo XClarity
Provisioning Manager V3 interface is displayed by default. You can perform memory diagnostics from
this interface. From the Diagnostic page, click
Run Diagnostic
➙
Memory test
.
6. Replace the failing DIMMs that fails Memory Test.
Hard disk drive problems
Use this information to resolve issues related to the hard disk drives.
• “Server cannot recognize a hard drive” on page 410
• “Multiple hard drives fail” on page 411
• “Multiple hard drives are offline” on page 411
• “A replacement hard disk drive does not rebuild” on page 412
• “Green hard disk drive activity LED does not represent actual state of associated drive” on page 412
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 status 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 and perform
corresponding operations in different situations:
• If the green activity LED is flashing and the yellow status LED is not lit, the drive is recognized by the
controller and is working correctly. Run the diagnostics tests for the hard disk drives. When you start
a server and press F1, the Lenovo XClarity Provisioning Manager V3 interface is displayed by default.
You can perform hard drive diagnostics from this interface. From the Diagnostic page, click
Run
Diagnostic
➙
HDD test
.
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ThinkSystem SR665 Maintenance Manual