APR Docking Doors

1.Remove the keyboard bezel.

2.Remove the display assembly.

3.Remove the keyboard.

4.Remove the palmrest assembly.

5.Remove the system board.

NOTICE: The tabs on the release button are plastic. Care should be taken when squeezing the tabs to avoid breaking them.

6.Using needle-nose pliers, gently squeeze the two tabs on the back of the release button together and grasp the top of the battery release latch and gently pull up to free it from the release button assembly (see Figure 24).

7.To remove the battery release latch, unhook the small tension spring located on the metal post next to the hard-disk drive.

1.Turn the computer upside down.

The APR docking doors should be at the top.

2.Carefully insert a small flat-blade screwdriver in the opening between the door edges and the edge of the door opening on the right side.

There is a small slot at the right edge of the door opening to show where the screwdriver is placed.

3.Gently push the screw driver against the right edge of the back door to cause the door to bow up at their center.

4.Grasp the back door as it bows up while still pressing the door edge with the screwdriver.

5.Carefully slip the right-edge hinge of the back door off its right hinge pin.

NOTICE: The doors are attached to each other by a tension spring at the left end of the doors. Do not try to separate the doors from each other. They must be removed together.

6.Gently push the screw driver against the right edge of the front door to cause the door to bow up at their center.

7.Grasp the front door as it bows up while still pressing the door edge with the screwdriver.

8.Carefully slip the right-edge hinge of the front door off its right hinge pin.

9.Grasping both doors together, carefully slip the left side of each door off their left hinge pins.

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Dell Latitude 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.