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Removing/Replacing Parts Recommended Tools Screw Identification and Tightening Precautionary Measures ZIF Connectors
Field-Replaceable Parts and Assemblies
LCD Assembly
Top Case Assembly
Keyboard
Speaker Board
Trackball Assembly
Board Assembly
Unless otherwise noted, each of the procedures in this section assumes the following:

      The computer and any attached peripherals are turned off and the peripherals are disconnected from the computer's
      I/O panel.

      A part can be replaced by performing the removal procedure in reverse order.

When performing the procedures that require the display assembly to be open, use a book or something similar to support the display assembly. The angle of the display assembly with respect to the bottom case should not exceed 180 degrees. Also assume that locations or directions relative to the computer are as shown in computer orientation unless otherwise specified in a procedure.
Recommended Tools
Most of the procedures require the use of one or more of the following tools:

      Small flat-blade screwdriver

      Number 1 magnetized Phillips-head screwdriver

      Number 2 magnetized Phillips-head screwdriver

      Wrist grounding strap

      Needle-nose pliers

      Small scribe (or Delrin screwdriver)

      Open-end wrench (7/32 inch)

Screw Identification and Tightening
CAUTION: It is essential that the correct length screw be used when reinstalling a screw. Otherwise, hardware damage could result. Make sure that the screw is properly aligned with its corresponding hole, and avoid overtightening. Where applicable, information about screws lengths is provided in illustrations. Before installing a screw, match the screw to the screw length graphics provided to check for correct length.
Precautionary Measures
Before starting to work on the computer, perform the following steps in the sequence indicated:

    1. Determine the power state of the computer.

       If the power/standby indicator is on or blinking, go to step 2.
       If the power/standby indicator is off, press the power button to turn on the computer and verify that it is not in
       suspend-to-disk mode.  Then proceed to step 2.

    2. Turn off the computer and any attached peripherals.

    3. Disconnect the computer and any attached peripherals from AC power sources to reduce the potential for personal
       injury or shock.

    4. Remove the main battery from the battery compartment.

       Turn the computer over.  With the back of the computer facing you, slide the battery release to the left and pull
       the battery straight out.

    5. Remove the hard-disk drive assembly.

       Unscrew the two hard-disk drive screws T1 and T2 (the screws are captive in the hard-disk drive assembly).  Then
       pull the drive straight out of the computer.

    6. Remove the diskette drive or optional battery from the diskette drive bay.

       With the back of the computer facing you, slide the diskette drive release to the right and pull the diskette
       drive or optional battery straight out.

    7. Remove any PC Cards.

       To remove a PC Card from the top connector, press the top eject button.  To remove a PC Card from the bottom
       connector, press the bottom eject button.  To remove a type III card, press the bottom eject button.

    8. To avoid possible damage to the computer from ESD, observe standard grounding procedures.

ZIF Connectors
CAUTION: ZIF connectors are fragile. To avoid breaking the connectors, touch them carefully. Do not apply too much pressure to the movable part of the connector when opening or closing it.
To disconnect an interface cable from a ZIF connector, follow these steps:

    1. Insert a small flat-blade screwdriver under the movable part of the connector.

       Carefully pry up first one end of the movable part of the connector and then the other end.
       Releasing a ZIF Connector.

    2. Pull gently upward on the movable part of the connector until it releases the interface cable.

    3. Grasp the interface cable and pull it out of the connector.

To reconnect an interface cable to a ZIF connector, follow these steps:

    1. Use the flat-blade screwdriver to open the movable part of the ZIF connector.

    2. Orient the end of the interface cable with the ZIF connector, and insert the end of the cable into the connector.

    3. While holding the cable in place, close the ZIF connector.

To ensure a firm connection, make sure the ZIF connector is completely closed.
Field-Replaceable Parts and Assemblies
Field-Replaceable Parts and Assemblies-Top Half
Field-Replaceable Parts and Assemblies-Bottom Half
The computer is divided into six major parts and assemblies:

      LCD assembly

      Top case assembly

      Keyboard

      Speaker board

      Trackball assembly

      Board assembly

The sections that follow provide instructions for removing and replacing these parts and assemblies.
LCD Assembly
LCD Assembly Removal
To remove the LCD assembly, follow these steps:

    1. Open the computer.

       Press the latch and lift the LCD assembly.

    2. Remove the memory module cover.

       Use a Delrin screwdriver or scribe to pry up the cover.

    3. Disconnect the three video connectors.

    4. Close the computer.

    5. Turn the computer around so you are facing the back of it, and remove the left and right hinge covers.

       Using a Delrin screwdriver or a scribe to prevent scratching, pry out and pull up the hinge covers.

    6. Remove the hinge screws H1, H2, H3, and H4.

       There is a spacer on each hinge that comes loose when you remove each set of screws.  There are EMI wires on
       screws H1 and H4 that come loose when you remove each screw.

    7. Remove EMI wire 1 and EMI wire 2 from hinge screws H2 and H3, respectively.

    8. Remove screw H5.

    9. Remove the LCD assembly from the computer.

       Press the latch and lift the LCD assembly off the computer.

Top Case Assembly
Top Case Assembly Removal
To remove the top case assembly, follow these steps:

    1. Remove the LCD assembly.

    2. Remove screws M1 through M6; lift off the top heat sink.

    3. Turn the computer over.  Remove the four adhesive rubber pads and bottom screws

CAUTION: There are three different lengths of bottom screws. Using the wrong length screw in a particular hole when replacing the top case assembly could damage the hardware.

    4. Turn the computer over, open the I/O panel cover, and remove the three upper screws (T11, T12, and T13) from the
       I/O panel.

       I/O Panel Screw Removal

    5. Disconnect the speaker cable from the speaker connector on the board assembly.

    6. Disconnect the keyboard cable from the board assembly.

       Lift up the front end of the top case assembly.  Use a small flat-blade screwdriver to release the ZIF connector
       securing the keyboard cable.

CAUTION: Lift the cable away only after the ZIF connector is opened (see ZIF Connectors). Pulling the cable from the connector damages the conductive coating on the end of the cable.

    7. Remove the keyboard.

    8. Remove the speaker board.

Keyboard
Keyboard Removal
To remove the keyboard, follow these steps:

    1. Remove the top case assembly, and turn it over so its front side faces toward you.

    2. Remove heat sink extension screws K11 and K12.

       There are two spacers and an insulator that are part of the heat sink extension.

    3. Remove screws K1 through K10.

NOTE: Do not remove the screw securing the speaker board to the top case assembly.

    4. Using a 7/32-inch open-end wrench, remove the standoff nut ST1.

    5. Pull the keyboard up and to the right to free it from the top case assembly.

Speaker Board
Speaker Board Removal
To remove the speaker board, follow these steps:

    1. Remove the keyboard.

    2. Remove screw K13 and lift the speaker board from the top case assembly.

       Lift the speaker from its recess in the top case assembly.

Trackball Assembly
Trackball Assembly Removal
To remove the trackball assembly, follow these steps:

    1. Remove the top case assembly.

    2. Disconnect the trackball cable from the board assembly.

       Use a small flat-blade screwdriver to release the ZIF connector securing the trackball cable.

CAUTION: Lift the cable away only after the ZIF connector is opened (see ZIF Connectors). Pulling the cable from the connector damages the conductive coating on the end of the cable.

    3. Remove the trackball grounding wire screw B1.

    4. Lift out the trackball assembly.

Board Assembly
Board Assembly Removal
To remove the board assembly, follow these steps:

    1. Remove the top case assembly.

    2. Remove the three bottom screws (T14, T15, and T16) from the I/O panel.

       I/O Panel Screw Removal

    3. Remove the trackball assembly.

    4. Remove the board assembly.  Lift the end of the board assembly nearest the mouse connector (see Board Assembly
       Removal, and pull the board up and out of the computer.