IBM 2179, User Manual

Page: 77 / 120

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 66 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.
Modem problems
Symptom Action
When you try to use the
modem, your computer or
modem is unable to detect
a dial tone.
1. Make sure the telephone line is correctly connected to
your computer. If you are using other communication
devices in conjunction with the modem, such as an
asymmetric digital subscriber line (ADSL) adapter or
home networking adapter, refer to the documentation
for those devices to ensure the cords are properly
connected.
2. Make sure no one is using the telephone.
3. Make sure the telephone line is working.
4.
Add the modem command
x3
to the initialization string for the communication
program you are using. For help with changing the
initialization string, refer to the documentation that
comes with your communications program.
Chapter 6. Troubleshooting
61