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When Using Your Computer (continued)

•Clean the display with a soft, clean cloth and water. Apply the water to the cloth; then stroke the cloth across the display in one direction, moving from the top of the display to the bottom. Remove moisture from the display quickly and keep the display dry. Long- term exposure to moisture can damage the display. Do not use a commercial window cleaner to clean your display.

•If your computer gets wet or is damaged, follow the procedures described in “If Your Computer Gets Wet” or “If You Drop or Damage Your Computer” in the online User’s Guide. If, after following these procedures, you confirm that your computer is not operating properly, contact Dell (see the User’s Guide for the appropriate contact information).

Ergonomic Computing Habits

CAUTION: Improper or prolonged keyboard use may result in injury.

CAUTION: Viewing the display or external monitor screen for extended periods of time may result in eye strain.

For comfort and efficiency, observe the ergonomic guidelines in your User’s Guide when setting up and using your computer.

When Working Inside Your Computer

Before removing or installing memory modules, Mini PCI cards, or modems, perform the following steps in the sequence indicated.

NOTICE: The only time you should ever access the inside of your computer is when you are installing memory modules, a Mini PCI card, or a modem.

NOTICE: Wait 5 seconds after turning off the computer before disconnecting a device or removing a memory module, Mini PCI card, or modem to help prevent possible damage to the system board.

1Shut down your computer and turn off any attached devices.

2Disconnect your computer and devices from electrical outlets to reduce the potential for personal injury or shock. Also, disconnect any telephone or telecommunication lines from the computer.

3Remove the main battery from the battery bay and, if necessary, the second battery from the module bay.

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System Information Guide

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Dell C840 manual Ergonomic Computing Habits, When Working Inside Your Computer
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C840 specifications

The Dell C840, released in the early 2000s, was a powerful mobile workstation designed to meet the needs of professionals who demanded high performance in a portable format. As part of Dell's Precision series, the C840 was well-regarded for its robust build quality, advanced features, and capability to handle intensive computing tasks.

One of the standout features of the Dell C840 was its Intel Pentium 4 processor, which offered impressive processing power at the time. Users could opt between different configurations, some even including the Intel Pentium 4 Extreme Edition for those seeking maximum performance. The system was designed to handle demanding applications such as CAD, 3D modeling, and other graphics-intensive programs, making it a favorite among architects, engineers, and graphic designers.

The C840 also featured a vibrant 15-inch display, with options for a high-resolution screen that provided sharp visuals and ample screen real estate for multitasking. The display's quality was complemented by NVIDIA graphics options, including the Quadro4 700 Go graphics card, which was optimized for professional applications, ensuring smoother graphics rendering and improved performance in 3D applications.

In terms of memory, the Dell C840 supported a generous amount of RAM, with configurations allowing up to 2GB, which was substantial for its time. This memory capacity contributed to better multitasking capabilities and overall system performance, allowing users to run multiple applications simultaneously without noticeable slowdowns.

Connectivity was another strong point of the Dell C840. The laptop featured a variety of ports, including USB ports, parallel and serial ports, and an optional docking station, which enhanced its versatility for connecting to various peripherals. Wireless technology was also a part of the package, with the inclusion of Wi-Fi capabilities, making it easier for users to stay connected in different environments.

Durability and design were key aspects as well. The C840 featured a solid chassis designed to withstand the rigors of mobility, making it suitable for on-the-go professionals. Its keyboard was designed for comfort and responsiveness, a critical feature for users who spent long hours typing.

In summary, the Dell C840 was a notable mobile workstation that combined power, performance, and portability. With its advanced Intel processors, high-quality display, robust graphics options, ample memory, and strong connectivity features, it catered to professionals looking for a reliable and efficient tool to handle their demanding workloads. Though technology has evolved significantly since its release, the Dell C840 remains a milestone in the history of mobile computing for professionals.
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