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compaq presario 900 series User Manual

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    							1–16Maintenance and Service Guide
    Product Description
    The computer keyboard components are shown in Figure 1-4 and 
    described in Table 1-6.
    Figure 1-4. Keyboard Components
    Table 1-6
    Keyboard Components
    Item Component Function
    1
    F1 through F12 
    function keysPerform preset functions.
    2
    Fn key Used with hotkeys to perform preset hotkey 
    functions.
    272638-001.book  Page 16  Thursday, July 25, 2002  4:21 PM 
    						
    							Product Description
    Maintenance and Service Guide1–17
    3 Windows logo keys Display the Windows Start menu.
    4 Windows application 
    keyDisplays a menu when using a Microsoft 
    application. The menu is the same one that 
    is displayed by pressing the right mouse 
    button.
    5 Cursor control keys Move the cursor around the screen.
    6 Embedded numeric 
    keypadConverts keys to numeric keypad.
    7
    Num lock key Turns on the numeric lock function.
    On: Num lock is on and the embedded 
    numeric keypad is enabled.
    Table 1-6
    Keyboard Components (Continued)
    Item Component Function
    272638-001.book  Page 17  Thursday, July 25, 2002  4:21 PM 
    						
    							1–18Maintenance and Service Guide
    Product Description
    The computer top components are shown in Figure 1-5 and 
    described in Table 1-7.
    Figure 1-5. Top Components
    Table 1-7
    Top Components
    Item Component Function
    1 Power light On: Power is turned on.
    Blinking: Computer is in Standby. The 
    power light also blinks if a battery pack that 
    is the only available power source reaches 
    a low-battery condition.
    2 Num lock light On: Num lock is on and the embedded 
    numeric keypad is enabled.
    3 Easy Access 
    Buttons (3)Provide quick access to the Internet. Refer 
    to the Hardware Guide that ships with the 
    computer for information about these 
    buttons.
    272638-001.book  Page 18  Thursday, July 25, 2002  4:21 PM 
    						
    							Product Description
    Maintenance and Service Guide1–19
    4 Power button Turns on the computer. Use the operating 
    system Shut Down command to turn off the 
    computer.
    5 Digital audio button Launches Windows Media Player to play 
    MP3 music.
    6 Volume control buttons Adjust the volume of the stereo speakers.
    7 Caps lock light On: Caps lock is on.
    8 Drive indicator light Turns on when the hard drive, CD-, or 
    DVD-ROM drive is accessed.
    9 Display lid switch Turns off the computer display if the 
    computer is closed while on.
    10 TouchPad Moves the mouse cursor, selects, and 
    activates.
    11 TouchPad buttons Function like the left and right mouse 
    buttons on an external mouse.
    12 Power/Standby light On: Power is turned on.
    Off: Power is turned off.
    Blinking: Computer is in Standby mode.
    13 EasyScroll Scrolls the screen left, right, up, and down.
    14 Battery power light On: A battery pack is charging.
    Blinking: A battery pack that is the only 
    available power source has reached a 
    low-battery condition.
    Table 1-7
    Top Components (Continued)
    Item Component Function
    272638-001.book  Page 19  Thursday, July 25, 2002  4:21 PM 
    						
    							1–20Maintenance and Service Guide
    Product Description
    The external components on the bottom of the computer are 
    shown in Figure 1-6 and described in Table 1-8.
    Figure 1-6. Bottom Components 
    Table 1-8
    Bottom Components
    Item Component Function
    1 Hard drive retention screw Secures the hard drive to the 
    computer.
    2 Hard drive bay Supports the primary hard drive. 
    The hard drive is secured to the 
    computer by one screw.
    3 Mini PCI communications 
    compartmentContains the mini PCI modem 
    card.
    272638-001.book  Page 20  Thursday, July 25, 2002  4:21 PM 
    						
    							Product Description
    Maintenance and Service Guide1–21
    4 RJ-11 modem jack Connects the modem cable to an 
    internal modem. A modem cable is 
    included with internal modem 
    models.
    5 RJ-45 network jack Connects the network cable. A 
    network cable is not included with 
    the computer.
    6 Connector cover Protects the parallel, external 
    monitor, external keyboard/mouse, 
    and USB connectors.
    7 Certificate of Authenticity label Contains the Product Key, which 
    may need to be entered before 
    using some Windows operating 
    systems.
    8 Memory expansion 
    compartmentCovers the memory expansion 
    compartment that contains two 
    memory expansion slots for 
    memory expansion boards.
    9 Battery pack release switch Releases the battery pack from 
    the battery compartment.
    10 Battery bay Accepts an 8-cell Li ion 
    battery pack.
    11 Serial number Identifies the computer; needed 
    when you call Compaq customer 
    support.
    Table 1-8
    Bottom Components (Continued)
    Item Component Function
    272638-001.book  Page 21  Thursday, July 25, 2002  4:21 PM 
    						
    							1–22Maintenance and Service Guide
    Product Description
    1.6 Design Overview
    This section presents a design overview of key parts and features 
    of the computer. Refer to Chapter 3, “Illustrated Parts Catalog,” 
    to identify replacement parts and Chapter 5, “Removal and 
    Replacement Procedures,” for disassembly steps. The system 
    board provides the following device connections:
    ■Memory expansion board
    ■Hard drive
    ■Display
    ■Keyboard/TouchPad or pointing stick
    ■Audio
    ■AMD Athlon and Duron processors
    ■Fan
    ■PC Card
    ■Modem or modem/NIC
    The computer uses an electrical fan for ventilation. The fan is 
    controlled by a temperature sensor and is designed to turn on 
    automatically when high-temperature conditions exist. These 
    conditions are affected by high external temperatures, system 
    power consumption, power management/battery conservation 
    configurations, battery fast charging, and software applications. 
    Exhaust air is displaced through the ventilation grill located on 
    the left side of the computer.
    Ä
    CAUTION: To properly ventilate the computer, allow at least a 
    3-inch (7.6-cm) clearance on the left and right sides of the 
    computer.
    272638-001.book  Page 22  Thursday, July 25, 2002  4:21 PM 
    						
    							Maintenance and Service Guide2–1
    2
    Troubleshooting
    ÅWARNING: Only authorized technicians trained by Compaq should 
    repair this equipment. All troubleshooting and repair procedures 
    are detailed to allow only subassembly/module level repair. 
    Because of the complexity of the individual boards and 
    subassemblies, no one should attempt to make repairs at the 
    component level or make modifications to any printed wiring board. 
    Improper repairs can create a safety hazard. Any indication of 
    component replacement or printed wiring board modification may 
    void any warranty or exchange allowances.
    2.1 Computer Setup and 
    Diagnostics Utilities
    Selecting Computer Setup or 
    Compaq Diagnostics
    The computer features two Compaq system management utilities:
    ■Computer Setup—A system information and customization 
    utility that can be used even when your operating system is 
    not working or will not load. This utility includes settings that 
    are not available in Windows.
    272638-001.book  Page 1  Thursday, July 25, 2002  4:21 PM 
    						
    							2–2Maintenance and Service Guide
    Troubleshooting
    ■Compaq Diagnostics—A system information and diagnostic 
    utility that is used within your Windows operating system. 
    Use this utility whenever possible to:
    ❏Display system information.
    ❏Test system components.
    ❏Troubleshoot a device configuration problem in 
    Windows 2000, Windows XP Professional, or 
    Windows XP Home.
    Using Computer Setup
    Information and settings in Computer Setup are accessed from 
    the File, Security, or Advanced menus:
    1. Turn on or restart the computer. Press 
    F10 while the 
    F10 = ROM Based Setup message is displayed in the 
    lower-left corner of the screen.
    ❏To change the language, press F2.
    ❏
    To view navigation information, press F1.
    ❏
    To return to the Computer Setup menu, press esc.
    2. Select the File, Security, or Advanced menu.
    3. To close Computer Setup and restart the computer:
    ❏Select File > Save Changes and Exit and press enter.
    or
    ❏Select File > Ignore Changes and Exit and press enter.
    4. When you are prompted to confirm your action, press F10.
    272638-001.book  Page 2  Thursday, July 25, 2002  4:21 PM 
    						
    							Troubleshooting
    Maintenance and Service Guide2–3
    Selecting from the File Menu
    Table 2-1
    File Menu
    Select To Do This
    System Information■View identification information about the 
    computer, a docking base, and any battery 
    packs in the system.
    ■View specification information about the 
    processor, memory and cache size, and 
    system ROM.
    Save to Floppy Save system configuration settings to a diskette.
    Restore from Floppy Restore system configuration settings from a 
    diskette.
    Restore Defaults Replace configuration settings in Computer 
    Setup with factory default settings. (Identification 
    information is retained.)
    Ignore Changes and Exit Cancel changes entered during the current 
    session, then exit and restart the computer.
    Save Changes and Exit Save changes entered during the current 
    session, then exit and restart the computer.
    272638-001.book  Page 3  Thursday, July 25, 2002  4:21 PM 
    						
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