b.Lower the bottom end of the LCD panel into the top cover, making sure the LCD flex cable lines up with the opening that is to the right of the left hinge.

c.Make sure the narrow part of the flex cable that goes to the inverter is visible at the bottom edge of the LCD panel.

d.Press the LCD panel into the top cover.

5.Connect the narrow flex cable to the ZIF connector on the left side of the inverter.

6.With the connector side of the inverter facing up, connect the two-wire back-light plug to the connector on the right end of the inverter.

When the plug is all the way in the connector, the key slot in the center of the plug should not be visible. If you can see the key slot, the plug is not in the connector correctly. Pull the plug out, turn the plug over, and reinsert it into the connector.

7.Roll the inverter over (away from you), so the connector side of the inverter is up.

8.Place the inverter into the top cover, aligning the posts in the top cover with the alignment holes in the inverter.

9.Holding the inverter in place, reinstall the M2 x 3.5-mm screw that secures the inverter to the top cover.

10.Reinstall the four M2 x 3.5-mm screws, in the left and right ends of the top cover, that secure the LCD panel to the top cover.

11.Reinstall the display assembly latch.

12.Reinstall the display assembly bezel.

Display Assembly Hinges

1.Remove the keyboard bezel.

2.Remove the display assembly.

3.Remove the display bezel.

4.Remove the two M2.6 x 4-mm screws that secure the left hinge to the top cover (see Figure 9).

5.Remove the two M2.6 x 4-mm screws that secure the right hinge to the top cover.

When replacing the left and right hinges, make sure they are installed correctly. An L is stamped on the left hinge and an R is stamped on the right hinge.

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Dell Latitude L400 Service Manual

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Dell L400 service manual Display Assembly Hinges

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.