IBM pSeries 630 6C4 Service Manual page 98

Step 1240-10
1. Turn off the power. Remove the power cord.
2. Move the quad of DIMMs that is on the processor card to the other quad's location.
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" on page 74 still
appear?
NO Replace the processor card.
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 One or more of the DIMMs on the card is defective. Go to "Step 1240-11".
Step 1240-11
Attention: If only one quad of DIMMs is on the processor card, you must have at least one replacement
DIMM of the same size and speed as the DIMMs that are on the card.
If there were two quad of DIMMs on the processor card, but they are not the same size, your 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 quad of DIMMs on the processor card, 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 processor card and install the replacement DIMM or another known
good DIMM.
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" on page 74 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 1240-12" on page 79.
78 Eserver pSeries 630 Model 6C4 and Model 6E4 Service Guide