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Step 1240-6
Note: If only one quad of DIMMs is on the system planar, you must have at least one replacement DIMM
of the same size and speed as the DIMMs that are on the system planar.
If there were two quads of DIMMs on the system planar, but they are not the same size, you must
have at least one replacement DIMM of the same size and speed as the DIMMs in the quad that is
failing.
If there were two quads of DIMMs on the system planar, and they are the same size and speed,
DIMMs from the good quad can be used when isolating the failing DIMM in the suspect quad.
1. Turn off the power. Remove the power cord.
2. Remove one of the DIMMs on the system planar, and install the replacement DIMM or another DIMM
that is known to be good.
3. Reattach the power cord. Wait for OK in the operator panel.
4. Turn on the power. Attempt to boot to the SMS menus. (The system may stop with an 8-digit error
code before it reaches the SMS menus.)
5. Power down the system using the white button. After the OK appears in the operator panel, look at the
memory configuration/deconfiguration menu.
Are any DIMMs deconfigured or does the error code recorded in "Step 1240-1" on page 56 still
appear?
NO
The DIMM that was just removed was the failing DIMM; replace it.
Enable memory repeat gard if necessary.
Go to "MAP 0410: Repair Checkout" in the RS/6000 Eserver pSeries Diagnostic Information for
Multiple Bus Systems.
YES
Go to "Step 1240-7."
Step 1240-7
Have all the DIMMs in the quad located on the system planar been replaced?
NO
Go to "Step 1240-6" to test the next DIMM of the quad on the system planar.
YES
Go to "Step 1240-8."
Step 1240-8
Did the processor originally have only one quad of DIMMs at the start of this map?
NO
Call support.
YES
Replace the system planar. This ends the procedure. Enable memory repeat gard if necessary. Go
to "MAP 0410: Repair Checkout" in the RS/6000 Eserver pSeries Diagnostic Information for
Multiple Bus Systems.
Chapter 3. Maintenance Analysis Procedures (MAPs)
59
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