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compaq notebook evo n150 series User Manual

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    							Removal and Replacement Procedures
    Maintenance and Service Guide5–25
    2. Disconnect the fan cablefrom the system board
    (Figure 5-17).
    3. Remove the modem cable from the clip in the heat sink
    .
    4. Remove the four black M2 × 4.0 screws
    and the pewter
    M2.5 × 7.0 screw
    that secure the heat sink to the base
    enclosure.
    5. Remove the heat sink.
    Figure 5-17. Removing the Heat Sink
    The fan and heat sink are spared as one assembly. Do not remove
    the fan from the heat sink.
    Reverse the above procedure to install the heat sink. 
    						
    							5–26Maintenance and Service Guide
    Removal and Replacement Procedures
    5.15 Infrared Board
    1. Prepare the computer for disassembly (Section 5.3) and
    remove the following components:
    a. Hinge covers (Section 5.5)
    b. Keyboard (Section 5.6)
    c. Display (Section 5.7)
    d. EMI shield (Section 5.8)
    e. Top cover (Section 5.9)
    Infrared Board
    Spare Part Number Information
    Infrared board 239045-001 
    						
    							Removal and Replacement Procedures
    Maintenance and Service Guide5–27
    2. Disconnect the infrared board cablefrom the system board
    (Figure 5-18).
    3. Remove the infrared board cable from the metal clip
    
    through which it is routed.
    4. Remove the black M2 × 4.0 screw
    that secures the infrared
    board to the base enclosure.
    5. Lift the infrared board
    out of the base enclosure.
    Figure 5-18. Removing the Infrared Board
    Reverse the above procedure to install the infrared board. 
    						
    							5–28Maintenance and Service Guide
    Removal and Replacement Procedures
    5.16 System Board
    There are 11 screws and screwlocks in five different sizes that
    must be removed and replaced when replacing the system board.
    Make special note of each screw size and location when removing
    and replacing screws.
    1. Prepare the computer for disassembly (Section 5.3) and
    remove the following components:
    a. Hinge covers (Section 5.5)
    b. Keyboard (Section 5.6)
    c. Display (Section 5.7)
    d. EMI shield (Section 5.8)
    e. Top cover (Section 5.9)
    f. Infrared board (Section 5.15)
    2. Turn the base enclosure top side up with the rear panel
    facing you.
    System Board
    Spare Part Number Information
    System boards (includes 64 MB SDRAM)
    800 MHz Intel Pentium III
    700 MHz Intel Celeron239051-001
    239050-001 
    						
    							Removal and Replacement Procedures
    Maintenance and Service Guide5–29
    3. Remove the six 5.0-mm screwlocks from the rear panel of the
    computer (Figure 5-19).
    Figure 5-19. Removing the System Board Screwlocks 
    						
    							5–30Maintenance and Service Guide
    Removal and Replacement Procedures
    4. Position the base enclosure so the front faces you.
    5. Remove the following screws, as illustrated in Figure 5-20:
    two black M2 × 14.5 screwsthat secure the PC Card
    assembly to the base enclosure
    black M2.5 × 4.5 screwnear the USB connector that
    secures the system board to the base enclosure
    black M2.5 × 4.0 screwthat secures the modem
    connector/cable to the base enclosure
    blackM2×4.0screwnear the display connector that
    secures the system board to the base enclosure
    Figure 5-20. Removing the System Board Screws 
    						
    							Removal and Replacement Procedures
    Maintenance and Service Guide5–31
    6. Lift up the front edge of the system boarduntil the board
    and the battery connector
    are clear of the base enclosure
    (Figure 5-21).
    ÄCAUTION:When removing the system board, make sure the
    battery connectoris carefully routed out of the openingin the
    base enclosure in which it rests. Failure to follow this caution can
    result in damage to the battery connector.
    Figure 5-21.Lifting the System Board 
    						
    							5–32Maintenance and Service Guide
    Removal and Replacement Procedures
    7. Slide the system board out of the base enclosure at an angle
    (Figure 5-22).
    Figure 5-22. Removing the System Board
    Reverse the above procedure to install the system board. 
    						
    							Removal and Replacement Procedures
    Maintenance and Service Guide5–33
    5.17 PC Card Assembly
    1. Prepare the computer for disassembly (Section 5.3)) and
    remove the following components:
    a. Hinge covers (Section 5.5)
    b. Keyboard (Section 5.6)
    c. Display (Section 5.7)
    d. EMI shield (Section 5.8)
    e. Top cover (Section 5.9)
    f. Infrared board (Section 5.15)
    g. System board (Section 5.16)
    2. Turn the system board bottom side up with the PC Card slot
    opening facing you.
    PC Card Assembly
    Spare Part Number Information
    PC Card assembly 239040-001 
    						
    							5–34Maintenance and Service Guide
    Removal and Replacement Procedures
    3. Peel back the shielding tape that covers the right PC Card
    screw
    (Figure 5-23).
    4. Remove the two silver M2 × 5.0 screws
    that secure the
    PC Card assembly to the system board.
    5. Turn the system board top side up with the PC Card slot
    opening facing you.
    6. Lift up the back edge of the PC Card assembly to disconnect
    it from the system board
    .
    7. Remove the PC Card assembly.
    Figure 5-23. Removing the PC Card Assembly
    Reverse the above procedure to install the PC Card assembly. 
    						
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