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compaq presario 900 series User Manual

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    							2–14Maintenance and Service Guide
    Troubleshooting
    Flowchart 2.4 - No Power, Part 3
    Continued from 
    Flowchart 2.3,
    No Power, Part 2.
    Reseat AC adapter
    in computer and
    at power source.
    Internal or
    external AC
    adapter? Done
    Done
    Done Done Power on?
    Power on?Power on? Plug directly
    into AC outlet.
    Power LED
    on?
    Power outlet
    active?Try different
    outlet.Replace external
    AC adapter.
    Replace
    power cord.
    Y
    N
    Y
    Y Y
    Y N
    NN
    N
    External
    Internal
    Go to
    Flowchart 2.5,
    No Power,
    Part 4.
    272638-001.book  Page 14  Thursday, July 25, 2002  4:21 PM 
    						
    							Troubleshooting
    Maintenance and Service Guide2–15
    Flowchart 2.5 - No Power, Part 4
    Y
    N
    Continued from 
    Flowchart 2.4,
    No Power, Part 3.
    Reseat loose
    components and
    boards and 
    replace
    damaged items. Open
    computer.
    Loose or
    damaged
    parts?
    Y
    Close
    computer and
    retest.
    Power on?
    Done
    N
    Replace the following items (if applicable). 
    Check computer operation after each 
    replacement:
    1. Internal DC-DC converter*
    2. Internal AC adapter
    3. Processor board*
    4. System board*
    *Replace these items as a set to prevent 
    shorting out among components.
    272638-001.book  Page 15  Thursday, July 25, 2002  4:21 PM 
    						
    							2–16Maintenance and Service Guide
    Troubleshooting
    Flowchart 2.6 - No Video, Part 1
    A
    N
    Stand-alone
    or docking
    station? No video.
    Replace the following one at a time. Test after each replacement.
    1. Cable between notebook and computer display (if applicable)
    2. Inverter board (if applicable)
    3. Display
    4. System board
    Internal or
    external
    display*?Adjust
    brightness.Video OK? Done Docking
    station
    Internal
    Stand-alone
    External
    Adjust
    brightness.
    Video OK? Done
    Y
    Press lid
    switch to ensure
    operation.
    Video OK? Done
    Y
    N
    Video OK?
    DoneDone
    N
    Check for bent
    pins on cable.
    Tr y
    another
    display.Internal and
    external
    video OK?Replace
    system
    board.
    YYN N
    * To change from internal to 
    external display, use the hotkey 
    combination.
    Y
    Go to
    Flowchart 2.7,
    No Video, Part 2.
    272638-001.book  Page 16  Thursday, July 25, 2002  4:21 PM 
    						
    							Troubleshooting
    Maintenance and Service Guide2–17
    Flowchart 2.7 - No Video, Part 2
    Y
    N
    Continued from
    Flowchart 2.6,
    No Video, Part 1.
    Done Video OK?
    Adjust external
    monitor display.Adjust
    display
    brightness.
    Video OK?Video OK?
    Done Done
    Check that notebook is properly 
    seated in docking station, for bent 
    pins on cable, and for monitor 
    connection.Go to “A” in
    Flowchart 2.6,
    No Video, Part 1.Check brightness
    of external 
    monitor.
    Try another
    external
    monitor.
    Internal
    and external
    video OK?
    Go to
    Flowchart 2.8,
    Nonfunctioning
    Docking Station.
    YY
    Y N
    N
    N
    Remove 
    notebook from 
    docking station, 
    if connected.
    272638-001.book  Page 17  Thursday, July 25, 2002  4:21 PM 
    						
    							2–18Maintenance and Service Guide
    Troubleshooting
    Flowchart 2.8 - Nonfunctioning Docking Station
    (if applicable)
    Y
    N
    Reseat power 
    cord in docking
    station and
    power outlet.
    N
    Replace the following docking station 
    components one at a time. Check 
    computer operation after each 
    replacement.
    1. Power supply
    2. I/O board
    3. Backplane board
    4. Switch box
    Check voltage 
    setting on 
    docking station.
    Reset monitor 
    cable connector at 
    docking station.Reinstall 
    notebook into 
    docking station.
    Docking
    station
    operating?
    Docking
    station
    operating?
    Remove 
    notebook, reseat 
    all internal parts, 
    and replace any 
    damaged items in 
    docking station.DoneDone
    Y
    Nonfunctioning
    docking station.
    272638-001.book  Page 18  Thursday, July 25, 2002  4:21 PM 
    						
    							Troubleshooting
    Maintenance and Service Guide2–19
    Flowchart 2.9 - No Operating System (OS) Loading
    No OS loading
    from hard drive,
    go to Flowchart 2.10, 
    No OS Loading from 
    Hard Drive, Part 1.
    Reseat power 
    cord in docking
    station and
    power outlet.
    No OS
    loading.*
    * Before beginning troubleshooting, always 
    check cable connections, cable ends, and 
    drives for bent or damaged pins.
    No OS loading
    from CD- or
    DVD-ROM drive,
    go to Flowchart 2.14,
    No OS Loading
    from CD- or
    DVD-ROM Drive.
    No OS loading
    from diskette drive,
    go to Flowchart 2.13, 
    No OS Loading from 
    Diskette Drive.
    272638-001.book  Page 19  Thursday, July 25, 2002  4:21 PM 
    						
    							2–20Maintenance and Service Guide
    Troubleshooting
    Flowchart 2.10 - No OS Loading from Hard Drive, Part 1
    Go to
    Flowchart 2.17,
    Nonfunctioning
    Device.
    Y
    Done
    N
    OS not
    loading from
    hard drive.
    Nonsystem
    disk message?Go to
    Flowchart 2.11,
    No OS Loading 
    from Hard Drive, 
    Part 2.
    Reseat
    external
    hard drive.
    OS loading?
    Done
    Boot from
    CD?
    Go to
    Flowchart 2.13,
    No OS
    Loading from
    Diskette Drive.
    Boot from
    hard drive?
    Boot from
    diskette?
    Change boot
    priority through
    the setup utility
    and reboot.
    Boot from
    hard drive?
    Y Y
    Y YY
    N N
    N N N
    Check the setup 
    utility for correct 
    booting order.
    272638-001.book  Page 20  Thursday, July 25, 2002  4:21 PM 
    						
    							Troubleshooting
    Maintenance and Service Guide2–21
    Flowchart 2.11 - No OS Loading from Hard Drive, Part 2
    Continued from
    Flowchart 2.10,
    No OS Loading 
    from Hard Drive, 
    Part 1.
    Reseat
    hard drive.
    Done CD or
    diskette in
    drive?1. Replace hard 
    drive.
    2. Replace 
    system board.
    Go to
    Flowchart 2.13,
    No OS Loading 
    from Diskette 
    Drive.
    Load OS using 
    Restore CD 
    (if applicable). Format hard drive 
    and bring to a 
    bootable C: 
    prompt.Create partition, 
    then format hard 
    drive to bootable 
    C: prompt. Remove
    diskette and 
    reboot.
    YN
    Boot from
    hard drive?
    Y
    N
    YN
    Hard drive 
    accessible?
    YN
    Hard drive
    accessible?Done
    Run FDISK.
    Y
    N
    Hard drive
    partitioned?
    Hard drive
    formatted?
    YN
    YN
    Computer
    booted?
    Done
    Y
    N
    Go to
    Flowchart 2.12,
    No OS Loading 
    from Hard Drive,
    Part 3.Go to
    Flowchart 2.12,
    No OS Loading 
    from Hard Drive,
    Part 3. Boot from 
    diskette drive?
    272638-001.book  Page 21  Thursday, July 25, 2002  4:21 PM 
    						
    							2–22Maintenance and Service Guide
    Troubleshooting
    Flowchart 2.12 - No OS Loading from Hard Drive, Part 3
    Y
    System
    files on hard
    drive? Continued from 
    Flowchart 2.11,
    No OS Loading 
    from Hard Drive,
    Part 2.
    Clean virus.
    Done
    N
    Install OS
    and reboot.
    Virus
    on hard
    drive?OS
    loading from
    hard drive?
    Y
    NY
    N
    Y
    N
    Diagnostics
    on diskette?Replace
    hard drive.
    Run diagnostics
    and follow
    recommendations. Run SCANDISK 
    and check for
    bad sectors.
    Can bad
    sectors
    be fixed?Replace
    hard drive.
    YN
    YN
    Fix bad
    sectors.Boot from
    hard drive?Replace
    hard drive.
    Done
    272638-001.book  Page 22  Thursday, July 25, 2002  4:21 PM 
    						
    							Troubleshooting
    Maintenance and Service Guide2–23
    Flowchart 2.13 - No OS Loading from Diskette Drive
    Done
    Y
    N
    Reseat
    diskette drive. OS not loading
    from
    diskette drive.
    Done
    Y
    YY Y
    Y
    Y Y N
    N
    N NN
    NN
    OS
    loading?
    Nonsystem
    disk message?Bootable
    diskette
    in drive?Install bootable
    diskette and
    reboot computer.
    Check diskette
    for system files.
    Try different 
    diskette.
    1. Replace 
    diskette drive.
    2. Replace 
    system board. Nonsystem
    disk error?
    OS
    loading? Boot
    from another
    device?
    Enable drive
    and cold boot
    computer.
    Diskette
    drive boot
    order?
    Change boot
    priority using
    the setup utility.Go to
    Flowchart 2.17,
    Nonfunctioning
    Device.
    Diskette
    drive enabled
    in the setup 
    utility?
    Go to
    Flowchart 2.17,
    Nonfunctioning
    Device. Clear CMOS. 
    Refer to 
    Section 1.3, 
    “Clearing a 
    Password,” for 
    instructions.
    272638-001.book  Page 23  Thursday, July 25, 2002  4:21 PM 
    						
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