Memory Problems

Use a virus-scanning program to check the hard drive, floppy disks, CDs, or DVDs

Save and close any open files or programs and shut down your computer through the Start menu

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions that shipped with your computer.

If you receive an insufficient memory message —

•Save and close any open files and exit any open programs you are not using to see if that resolves the problem.

•See the software documentation for minimum memory requirements. If necessary, install additional memory (see Replacing a Memory Module).

•Reseat the memory modules (see Memory) to ensure that your computer is successfully communicating with the memory.

•Run the Dell Diagnostics (see Dell Diagnostics).

If you experience other memory problems —

•Reseat the memory modules (see Memory) to ensure that your computer is successfully communicating with the memory.

•Ensure that you are following the memory installation guidelines (see Replacing a Memory Module).

•Ensure that the memory you are using is supported by your computer. For more information about the type of memory supported by your computer, see the Setup and Quick Reference Guide for your computer at support.dell.com.

•Run the Dell Diagnostics (see Dell Diagnostics).

Power Problems

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions that shipped with your computer.

If the power light is blue and the computer is not responding — See Diagnostic Lights.

If the power light is off — The computer is either turned off or is not receiving power.

•Reseat the power cable in the power connector on the back of the computer and the electrical outlet.

•Bypass power strips, power extension cables, and other power protection devices to verify that the computer turns on properly.

•Ensure that any power strips being used are plugged into an electrical outlet and are turned on.

•Ensure that the electrical outlet is working by testing it with another device, such as a lamp.

Eliminate interference — Some possible causes of interference are:

•Power, keyboard, and mouse extension cables

•Too many devices connected to the same power strip

•Multiple power strips connected to the same electrical outlet

Sound and Speaker Problems

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions that shipped with your computer.

No sound from speakers

NOTE: The volume control in MP3 and other media players may override the Windows volume setting. Always check to ensure that the volume on the media player(s) has not been turned down or off.

Adjust the Windows volume control — Click or double-click the speaker icon in the lower-right corner of your screen. Ensure that the volume is turned up and that the sound is not muted.

Disconnect headphones from the headphone connector — Sound from the speakers is automatically disabled when headphones are connected to the computer's front-panel headphone connector.

Eliminate possible interference — Turn off nearby fans, fluorescent lights, or halogen lamps to check for interference.

Run the Hardware Troubleshooter — See Hardware Troubleshooter.

E6400 ATG, E6400 specifications

The Dell Latitude E6400 and E6400 ATG are part of the renowned Latitude series from Dell, designed specifically for business professionals who require durability, portability, and performance. Launched in the late 2000s, these laptops have been popular choices among users seeking reliable devices that can withstand everyday rigors.

The Dell E6400 stands out for its robust design and is built to last, featuring a magnesium alloy chassis and a reinforced palm rest. This model is equipped with a 14.1-inch display that offers resolution options including HD and WXGA, making it suitable for various tasks, from spreadsheets to presentations. The screen's anti-glare coating ensures visibility in different lighting conditions, enhancing user experience during prolonged usage.

Powering the E6400 is Intel’s Core 2 Duo processor, providing substantial performance for multitasking and business applications. It supports up to 8GB of RAM, allowing users to run multiple applications seamlessly. The laptop also incorporates a range of storage options, accommodating HDDs or SSDs, which contributes to faster boot times and application launch speeds.

On the connectivity front, the E6400 offers several ports including USB 2.0, an HDMI port, and an Ethernet port, making it versatile for both local and remote work. An optional docking station enhances expansion possibilities, turning it into a powerful workstation.

The E6400 ATG, or All-Terrain Grade, is designed for more demanding environments. It features a rugged exterior, meeting military specifications (MIL-STD-810F) for durability against shocks, drops, and extreme temperatures. The laptop is sealed to protect from dust and moisture, making it an excellent choice for workers in construction, field services, or any outdoor profession.

In terms of power efficiency, both models boast outstanding battery life, often lasting up to 8 hours on a single charge, depending on usage and configuration. The inclusion of Trusted Platform Module (TPM) and optional biometric fingerprint readers enhances security, ensuring sensitive business data remains protected.

Overall, the Dell Latitude E6400 and E6400 ATG balance performance and robustness, making them ideal for professionals on the go and those who require a rigorous workhorse in challenging environments. These models reflect Dell's commitment to quality and innovation in the business laptop segment, catering to a wide array of user needs.