IBM RS6000 Service Guide - Page 115

e. Remove the suspect bad tag, re-install the 2nd Memory Card and power the system up. If the system no longer stops at an E3xx code, re-seating the Memory Cards (again) has corrected the problem. If the system stops at an E3xx code again, skip to step 7 on page 3-44. 4. Attempt to isolate the problem to a specific memory DIMM pair on the Memory Card tagged as suspect bad: a. Power the system down. b. Remove all installed memory DIMMs from the suspect bad Memory Card except one pair. Record the original positions of any memory DIMMs removed so that when instructed to re-install them they can be installed in their original position. c. Power the system up. d. If the system no longer stops at an E3xx code, skip to step 4g. e. Replace the memory DIMM pair left installed in step 4b, and tag the removed memory DIMM pair as suspect bad. f. Power the system up. If the system stops at an E3xx code, skip to step 6 on page 3-44. g. Power down the system h. If there are more memory DIMM pairs to be re-installed on the suspect bad Memory Card, install another memory DIMM pair in their original positions on the Memory Card, and continue with step 4i. If there are no more memory DIMM pairs to be re-installed, you either have a suspect bad memory DIMM pair or simply reseating the memory DIMMs on the Memory Card card has corrected the problem. If you have a suspect bad memory DIMM pair, continue with step 5. i. Power the system up. j. If the system does not stop at an E3xx code, continue at step 4g. k. If the system has stopped at an E3xx code again, replace the memory DIMM pair that was just re-installed and tag the removed memory DIMM pair as suspect bad. l. Power the system up. If the system again stops at an E3xx code, continue with step 6 on page 3-44. If the system does not stop at an E3xx code, continue with step 4g. 5. Determine which of the suspect bad memory DIMMs is defective (may be both). For each of the 2 memory DIMMs tagged as suspect bad: a. Power the system down. Removing the currently installed memory DIMM first, re-install one of the 2 suspect bad memory DIMMs in its original position. b. Power the system up. If the system again stops at an E3xx code, the memory DIMM tagged suspect bad just installed is defective, replace it with the memory DIMM removed in step 5a. If the system did not stop at an E3xx code, remove the suspect bad tag from the memory DIMM just installed - it is not defective. Chapter 3. Error Code to FRU Index 3-43