General Memory InformationBe sure to unplug the power cables before removing or installing the memory DIMMs toavoid damage to them.Memory DIMMs must be installed in matched (size and speed) pairs. Refer to “MemoryCard and Memory DIMMs” on page 266 for labeling of the memory card andinstructions on DIMM removal and installation. (Do not, however, replace the covers asdirected while troubleshooting this problem.) A single memory DIMM pair may beinstalled in module slots J1 and J2 (not slots J1 and J3). A second memory DIMM paircould be installed in module slots J5 and J6 (slots J3 and J4 do not have to bepopulated first). Along these same lines, there is no requirement that memory DIMMslots J1 and J2 be populated before another slot pair.Step 1240-11. Turn off the power.2. Remove all installed memory DIMMs from the memory card. Record the positions ofthe memory DIMMs so that when instructed to reinstall them they can be installed intheir original positions.3. Install one pair of memory DIMMs.4. Turn on the power.Does the system stop with a memory checkpoint or memory error code displayedon the operator panel?NO If there are no more memory DIMMs to be installed, reseating the DIMMs onthe memory card has corrected the problem.If there was more than one pair of memory DIMMs on the memory card, go to“Step 1240-2” on page 51.YES Go to “Step 1240-3” on page 51.50 Service Guide
