6.Turn the computer right-side up.

7.Open the display.

8.Remove the left and right hinge covers.

NOTE: When replacing the display assembly, the left hinge cover must go over the left hinge and the right hinge cover must go over the right hinge. They are not interchangeable. An L is stamped on the bottom of the left hinge cover and an R is stamped on the bottom of the right hinge cover.

9.Remove the M2 x 9.5-mm screw that secures the LCD flex-cable hold-down clip and the LCD flex-cable connector to the system board assembly (see Figure 8).

The M2 x 9.5-mm screw also secures the left side of the modem retainer bracket to the system board assembly.

10.Carefully disconnect the LCD flex-cable connector from the system board.

11.Lift the display assembly from the bottom assembly.

To replace the display assembly, perform the following steps:

1.Place the display assembly on the bottom assembly.

Insert the left and right hinge posts into the holes at the top of the palmrest.

2.Carefully connect the LCD flex cable to the connector on the system board.

3.Place the LCD flex-cable hold-down clip over the LCD flex-cable connector (see Figure 8).

The tab at the left of the clip should go under the palm rest, and the screw hole on the right side of the clip should line up with the holes in the connector ground strip and the threaded hole in the system board.

4.Reinstall the M2 x 9.5-mm screw that secures the LCD flex-cable hold-down clip to the system board.

5.Close the display.

You may have to press down on the back end of the display (above the hinges) while closing the display to get the display to close completely.

6.Reinstall the two M2 x 4.5-mm screws that secure the display assembly to the bottom case.

You may have to squeeze the display assembly and the bottom assembly together, so the screw holes align in the base assembly and the hinge posts.

Do not completely tighten the screws.

10 Dell Latitude L400 Service Manual

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Dell L400 service manual

L400 specifications

The Dell L400 is a notable laptop that emerged in the late 1990s, specifically designed for business professionals and mobile users. This portable computer was celebrated for its lightweight design and solid performance during an era when mobile computing was starting to gain traction.

One of the key features of the Dell L400 is its compact size. Weighing in at just around four pounds, it was easy to carry, making it an ideal choice for users who needed to travel. Its 12.1-inch display was a notable aspect, featuring an active matrix screen that provided decent visual clarity for its time, thus enhancing the mobile computing experience. The display, although small by today’s standards, was designed for convenience and portability, balancing screen size with overall weight.

The L400 was powered by Intel's Pentium III processor, which delivered respectable performance for everyday tasks such as word processing, spreadsheets, and basic multimedia applications. This made it suitable for professionals who required a reliable device for work-related activities without the latest specifications of modern laptops. Additionally, it commonly featured between 64 to 128 MB of RAM, upgradeable, which allowed users to run multiple applications smoothly.

Storage options included traditional hard drives ranging from 6 to 20 GB, providing ample space for documents and essential software of the era. While this may seem limited compared to modern standards, it was a reasonable capacity for users at that time.

In terms of connectivity, the L400 integrated essential ports such as USB, parallel, and serial, catering to a variety of peripherals that users often employed. It also included an Ethernet port for network connectivity, which was crucial for business environments. The inclusion of a modem facilitated dial-up internet connections, reflecting the technology landscape of the late 90s.

Battery life was another significant attribute, as the Dell L400 offered decent longevity that allowed users to extend productivity without being tethered to a power outlet. It typically featured a lithium-ion battery that contributed to its portability.

Overall, the Dell L400 stands out as a historical example of early portable computing, marked by its balance of performance, portability, and connectivity. While it may not compete with modern laptops in terms of specifications, its design and functionality marked an important step in the evolution of mobile computing technology.