IBM pSeries 630 6C4 Service Manual page 94

Memory DIMMs, however, must be installed in matched (size and speed) quads. Refer to "Memory
DIMMs" on page 492 for labeling of the processor card and instructions on memory DIMM removal and
installation. Do not, however, replace the covers as directed while troubleshooting this problem. Memory
DIMM quads can only be installed in one of the following two memory DIMM slot combinations:
v 1, 3, 6 and 8
v 2, 4, 5 and 7
There is no requirement that memory DIMM slots 1, 3, 6 and 8 be populated before memory DIMM slots
2, 4, 5 and 7.
Attention: Go to the service processor menus. In the System Information Menu, select Memory
Configuration/ Deconfiguration. Verify on the first screen that memory repeat gard is disabled. If it is
enabled, disable it for the duration of this MAP. When exiting this MAP to go to MAP 0410 in the RS/6000
Eserver pSeries Diagnostic Information for Multiple Bus Systems; also return the setting to enabled if
necessary.
Step 1240-1
1. Record the error code and any location code(s) that sent you to this map.
2. Go to the service processor menus and disable memory repeat gard if it is not already disabled.
3. Turn off the power. Remove the power cord.
4. Remove and reinstall the processor cards.
5. Reattach the power cord. Wait for OK to display in the operator panel.
6. 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.)
7. Power off the system using the white button. After the OK displays in the operator panel, look at the
memory configuration/deconfiguration menu.
Are any DIMMs deconfigured or does the error code recorded earlier in this step still appear?
No If any FRU location codes were recorded earlier in this step, there may be an intermitent error.
Replace all FRUs with location codes recorded earlier in this step. If no FRU location codes were
recorded earlier in this step, reseating the processor cards must have fixed the problem.
Enable memory repeat gard if necessary.
Go to "MAP 0410: Repair Checkout" in the RS/6000 Eserver pSeries Diagnostic Information for
Multiple Bus Systems.
If there is only 1 processor card installed, tag it as "suspect bad" and go to "Step 1240-6" on
Yes
page 76. If there are 2 processor cards installed, go to "Step 1240-2".
Step 1240-2
1. Turn off the power. Remove the power cord.
2. Remove processor card 2.
3. Reattach the power cord. Wait for OK to display 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 off the system using the white button. After the OK displays 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" still appear?
No Go to "Step 1240-3" on page 75.
Yes Go to "Step 1240-6" on page 76.
74 Eserver pSeries 630 Model 6C4 and Model 6E4 Service Guide