IBM NETVISTA X40 6643 - Manual (Page 77)

Memory problems
Symptom Action
The amount of memory
displayed is less than the
amount of memory
installed. The amount of available memory shown might be
somewhat less than expected because of basic
input/output system (BIOS) shadowing and other resource
requirements (such as ACPI and USB).
Verify that:
1. You have installed the correct type of DIMMs for your
computer. See “Installing memory” on page 45.
2. The DIMMs are properly installed and securely
connected.
3. If you added or removed memory, you saved the new
configuration before exiting from the
Configuration/Setup Utility program.
If the problem persists, run the memory test from the
diagnostic program supplied with your computer. (See
“Running the IBM Enhanced Diagnostics program” on
page 67 for further information.) The computer might have
detected a bad DIMM and automatically reallocated
memory so that it could continue to operate.
If you cannot correct the problem, have the computer
serviced.
Chapter 6. Troubleshooting 61