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Memory problems
Print these instructions now and keep it with your computer for reference later.
If your memory is not operating properly, check the following items:
1. Verify that the memory is installed and seated correctly in your computer.
It may be necessary to remove all added memories to test the computer with only the factory-installed
memories, and then reinstall the memory one at a time to ensure a proper connection. For the
procedures to remove and reinstall a memory, refer to “Replacing memory” on page 123.
2. Check for error messages during startup.
Follow the appropriate corrective actions for Power-on self-test (POST). See “Error messages” on
page 203.
3. Verify that the latest system BIOS (UEF BIOS)for your model has been installed.
4. Verify the proper memory conguration and compatibility including the maximum memory size and the
memory speed.
For details, refer to the instructions in “Replacing memory” on page 123.
5. Run a diagnostic test. See “Diagnosing problems” on page 201
Modem and networking
The following are the most common modem and networking problems:
Modem problems
• Problem: Your modem application does not work with the built-in modem.
Solution: Make sure that the internal modem port is enabled by opening the Device Manager and doing
as follows:
For Windows 7 and Windows Vista:
1. Click Start.
2. Click Control Panel ➙ Hardware and Sound.
3. Click Device Manager. If you are prompted for an administrator password or conrmation, type the
password or provide conrmation.
4. Double-click Modems.
5. Right-click the device, and click Enable.
For Windows XP:
1. Click Start ➙ Control Panel.
2. Click Performance and Maintenance, and then click System.
3. Click the Hardware tab, and then click the Device Manager button.
4. Double-click Modems.
5. Right-click the device, and click Enable.
If the modem works correctly, set the following modem settings by doing the following:
For Windows 7 and Windows Vista:
1. Click Start.
2. Click Control Panel ➙ Hardware and Sound.
3. Click Phone and Modem Options.
4. Click the Modems tab. The name of the modem installed in your computer is highlighted.
Chapter 10. Troubleshooting computer problems 207