IBM RS/6000 7043 43P Series, Service Manual

Page: 54 / 273

MAP 1240: Memory Problem Resolution
Purpose of This MAP
Note: The firmware checkpoint that sent you here could be one of the following:
E122, E213, E214, E220 or E3xx.
These checkpoints are referred to as "a memory checkpoint" in this MAP.
Use this MAP to trouble shoot a problem during the memory test when the system
stops at a memory checkpoint and no error code is displayed on the system console.
General Memory Information
Be sure to unplug the power cable before removing or installing the memory modules
to avoid damage to them.
Model 150 memory modules do not need to be installed in pairs and can be installed
in any slot on the system board. There is no requirement that one slot be installed
before the other.
Refer to “Memory Modules” on page 8-20 for locations of the memory modules and
instructions on module removal and installation.
Note: If the symptom changes, check for loose cards, cables, and obvious
problems. If you do not find the problem, go to “MAP 1540: Minimum Configuration”
on page 2-21.
Step 1240-1
1. Ensure that the diagnostics and the operating system are shut down.
2. Power off the system. Refer to "Powering Off the System".
3. Remove and re-install any installed memory module(s).
4. Power on the system. Refer to "Powering On the System".
Does the system stop with a memory checkpoint displayed on the operator
panel?
NO Reseating the memory modules has corrected the problem.
Go to
"
MAP 0410: Repair Checkout
"
in the Diagnostics Information for
Multiple Bus Systems.
2-12
7043 43P Series Service Guide