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• See Chapter 3 "Parts listing" on page 29 to determine which components are consumable, structural, or CRU
parts.
• If an action step is preceded by "(Trained technician only)," that step must be performed only by a trained
technician.
Symptom
The amount of system memory
that is displayed is less than
the amount of installed
physical memory.
Multiple rows of DIMMs in a
branch are identified as failing.
Monitor or video problems
Use this information to diagnose and resolve monitor or video errors.
IBM updates the support website with the latest tips and techniques that you can use to resolve any
problems. Go to the BladeCenter support search website at http://www.ibm.com/supportportal/ to see if any
service bulletins have been generated. In the Search field, type 7875, retain tip, and chassis.
Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
The video monitor is a shared BladeCenter unit resource. First, make sure that the video monitor is assigned
to the blade server; then, see the following table and "Solving shared BladeCenter resource problems" on
page 258.
192
BladeCenter HS23 Blade ServerProblem Determination and Service Guide
Action
1. Make sure that:
• You have installed the correct type of memory (see "Installing a memory
module" on page 47).
• If you changed the memory, you updated the memory configuration in the
Setup utility (see "Using the Setup utility" on page 11).
• All banks of memory are enabled. The blade server might have automatically
disabled a memory bank when it detected a problem, or a memory bank
might have been manually disabled (see "Using the Setup utility" on page
11).
2. Check the event log for a memory error (see "Event logs" on page 79), follow the
actions to correct them.
3. Run the Setup utility to re-enable all disabled DIMMs (see "Using the Setup
utility" on page 11).
4. Save the settings and exit the Setup utility.
1. Make sure that the DIMMs are installed in the proper sequence (see "Installing a
memory module" on page 47).
2. Reseat the DIMMs and restart the server (see "Removing a memory module" on
page 45 and "Installing a memory module" on page 47).
3. Remove each DIMM one at a time, restarting the server after removing each
DIMM until the error is gone (see "Removing a memory module" on page 45).
4. Replace the failed DIMM; then, reinstall the DIMMs to their original connectors
and restart the server (see "Installing a memory module" on page 47). Make sure
that the installed DIMMs are valid configuration.
5. (Trained technician only) Replace the system board (see "Removing the system-
board assembly" on page 71 and "Installing the system-board assembly" on
page 71).
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