Lenovo ThinkServer RD340 (English) User Guide - Page 193

Memory module problems

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Symptom Multiple hard disk drives fail. Action backplane without bowing or causing movement of the backplane. 6. Ensure that the cable connection is correct. See "Connecting the cables" on page 36. 7. Reconnect the backplane power cable and repeat step 1 through step 4. 8. Reconnect the backplane signal cable and repeat step 1 through step 4. 9. If you suspect a problem with the backplane signal cable or the backplane: a. Replace the affected backplane signal cable. b. Replace the affected backplane. 1. Ensure that the cable connection is correct. See "Connecting the cables" on page 36. 2. Reconnect the power cables. 3. Reconnect the signal cables. 4. Replace the affected signal cables. 5. If you suspect a problem with the backplane, replace the affected backplane. Memory module problems Follow the suggested actions for the corresponding symptom in the order in which they are listed until the problem is solved. If none of these actions solve the problem, see "Troubleshooting procedure" on page 177 for the subsequent steps you should check after using the information in this topic. If the problem still cannot be solved, seek technical assistance. See Chapter 8 "Getting information, help, and service" on page 183. Notes: • If you are instructed to remove, install, or replace any CRUs, refer to the related procedure in Chapter 6 "Installing, removing, or replacing hardware" on page 73. • If an action step is preceded by "(Trained service technician only)," this action step is reserved for a trained service technician and must be performed only by a trained service technician. Symptom The amount of system memory that is displayed is less than the total capacity of the installed physical memory modules and you suspect a memory module problem. Action 1. Ensure that: • All memory modules are the correct type supported by the server. See "Memory module installation rules" on page 81. • You followed the memory module installation rules. See "Memory module installation rules" on page 81. • All memory modules are seated correctly and securely. • The system firmware is up-to-date. 2. Reinstall the memory modules. 3. Replace the suspect memory modules. 4. (Trained service technician only) Replace the system board. Chapter 7. Troubleshooting and diagnostics 181

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Symptom
Action
backplanewithoutbowingorcausingmovementof
the backplane.
6. Ensure that the cable connection is correct. See
“Connecting the cables” on page 36.
7. Reconnect the backplane power cable and repeat
step 1 through step 4.
8. Reconnect the backplane signal cable and repeat
step 1 through step 4.
9. If you suspect a problem with the backplane signal
cable or the backplane:
a. Replace the affected backplane signal cable.
b. Replace the affected backplane.
Multiple hard disk drives fail.
1. Ensure that the cable connection is correct. See
“Connecting the cables” on page 36.
2. Reconnect the power cables.
3. Reconnect the signal cables.
4. Replace the affected signal cables.
5. If you suspect a problem with the backplane, replace
the affected backplane.
Memory module problems
Followthesuggestedactionsforthecorrespondingsymptomintheorderinwhichtheyarelisteduntilthe
problemissolved.Ifnoneoftheseactionssolvetheproblem,see“Troubleshootingprocedure”onpage177
forthesubsequentstepsyoushouldcheckafterusingtheinformationinthistopic.Iftheproblemstillcannot
besolved,seektechnicalassistance.SeeChapter8“Gettinginformation,help,andservice”onpage183.
Notes:
• If you are instructed to remove, install, or replace any CRUs, refer to the related procedure in Chapter 6
“Installing, removing, or replacing hardware” on page 73.
•Ifanactionstepisprecededby“(Trainedservicetechnicianonly),”thisactionstepisreservedforatrained
servicetechnicianandmustbeperformedonlybyatrainedservicetechnician.
Symptom
Action
The amount of system memory that is displayed is less
than the total capacity of the installed physical memory
modulesandyoususpectamemorymoduleproblem.
1. Ensure that:
• All memory modules are the correct type
supported by the server. See “Memory module
installation rules” on page 81.
• You followed the memory module installation
rules. See “Memory module installation rules” on
page 81.
• All memory modules are seated correctly and
securely.
• The system firmware is up-to-date.
2. Reinstall the memory modules.
3. Replace the suspect memory modules.
4. (Trained service technician only) Replace the system
board.
Chapter 7
.
Troubleshooting and diagnostics
181