Dell Latitude C640 User Manual

NOTICE: If you need to install memory modules in two connectors, install a memory module in the
connector labeled "JDIM (DIMMA)" before you install a module in the connector labeled "JDIM2
(DIMMB)."
Ground yourself and install the new memory module:
Align the notch in the module with the slot in the center of the connector.a.
Slide the edge of the module firmly into the connector, and rotate the module down until you
hear a click. If you do not hear the click, remove the module and reinstall it.
b.
8.
NOTE: If the memory module is not installed properly, the computer does not boot. No error message
indicates this failure.
Replace the cover and screw(s).9.
NOTICE: If the memory module cover is difficult to close, remove the module and reinstall it. Forcing
the cover to close may damage your computer.
Insert the battery into the battery bay, or connect the AC adapter to your computer and an electrical
outlet.
10.
Turn on the computer.11.
As the computer boots, it detects the additional memory and automatically updates the system configuration
information.
Adding a Mini PCI Card

Dell Latitude C640 Specifications

General

Brand	Dell
Model	Latitude C640
Category	Laptop
Language	English

Summary

Finding Information

Safety Instructions

Crucial safety guidelines for operating the computer and preventing damage.

About Your Computer

Using the Keyboard and Touch Pad

Dell™ AccessDirect™ Button

Touch Pad

Track Stick

Using a Battery

Battery Performance

Information on battery life, optimal usage, and factors affecting performance.

Charging the Battery

Procedures for charging the battery and understanding charging indicators.

Removing a Battery

Step-by-step instructions for safely removing the computer's battery.

Power Management

Management Tips

Power Management Modes

Explanation of standby and hibernate modes for power conservation.

Power Options Properties

Solving Problems

Power Problems

Troubleshooting steps for issues related to the computer's power supply and battery.

Error Messages

Video and Display Problems

Sound and Speaker Problems

Printer Problems

Using the Dell Diagnostics

When to Use the Dell Diagnostics

Guidance on when to perform diagnostic tests for hardware issues.

Starting the Dell Diagnostics

Step-by-step instructions for launching the Dell Diagnostics utility.

Advanced Testing

Adding and Replacing Parts

Adding Memory

Detailed instructions for installing or replacing memory modules in the computer.

Adding a Mini PCI Card

Replacing the Hard Drive

Step-by-step guide for safely removing and installing the computer's hard drive.

Adding a Modem

Passwords

Using a Primary Password

Steps for setting up and using a primary password for computer startup.

Using an Administrator Password

Using a Hard Drive Password

Instructions for setting a password to protect data on the computer's hard drive.

Specifications

Microprocessor

Memory

Ports and Connectors

Battery

Getting Help

Technical Assistance

Procedures for obtaining technical support from Dell for hardware or software issues.

Online Services