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compaq evo notebook n800c series User Manual

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    							2–10Maintenance and Service Guide
    Troubleshooting
    2.3 Troubleshooting Flowcharts
    Ta b l e  2 - 4
    Troubleshooting Flowcharts Overview
    Flowchart Description
    2.1 Initial troubleshooting
    2.2 No power, part 1
    2.3 No power, part 2
    2.4 No power, part 3
    2.5 No power, part 4
    2.6 No video, part 1
    2.7 No video, part 2
    2.8 Nonfunctioning docking station
    2.9 No operating system (OS) loading
    2.10 No OS loading from hard drive, part 1
    2.11 No OS loading from hard drive, part 2
    2.12 No OS loading from hard drive, part 3
    2.13 No OS loading from diskette drive
    2.14 No OS loading from CD- or DVD-ROM drive
    2.15 No audio, part 1
    2.16 No audio, part 2
    2.17 Nonfunctioning device
    2.18 Nonfunctioning keyboard
    2.19 Nonfunctioning pointing device
    2.20 No network or modem connection
    268135-002.book  Page 10  Thursday, October 24, 2002  4:10 PM 
    						
    							Troubleshooting
    Maintenance and Service Guide2–11
    Flowchart 2.1—Initial Troubleshooting
    Connecting
    to network
    or modem?
    Begin
    troubleshooting.
    Is there
    power?
    Is the OS
    loading? Is there video?
    (no boot)
    Is there
    sound?Beeps,
    LEDs, or error
    messages?
    Keyboard/
    pointing
    device 
    working?Go to
    Section 2.17,
    Nonfunctioning
    Device. Go to
    Section 2.2,
    No Power.
    Go to
    Section 2.6,
    No Video.All drives
    working?
    Y
    Y
    Y
    Y
    YY
    Y
    Y N N
    N
    N
    N
    End
    N
    N
    N
    Go to
    Section 2.9,
    No OS Loading.
    Go to
    Section 2.15,
    No Audio.Go to
    Section 2.18,
    Nonfunctioning 
    Keyboard,
    or Section 2.19, 
    Nonfunctioning 
    Pointing Device. Check
    LED board,
    speaker
    connections.
    Go to
    Section 2.20,
    No Network or 
    Modem.
    268135-002.book  Page 11  Thursday, October 24, 2002  4:10 PM 
    						
    							2–12Maintenance and Service Guide
    Troubleshooting
    Flowchart 2.2—No Power, Part 1
    1. Reseat the power cables in the docking 
    station and at the AC outlet.
    2. Ensure the AC power source is active.
    3. Ensure that the power strip is working.
    Done
    Remove from
    docking station
    (if applicable).
    Power up
    on battery
    power?
    Power up
    on AC
    power?
    Power up
    in docking
    station?
    Power up
    on battery
    power?
    Power up
    in docking
    station?Done *Reset
    power.
    *Reset
    power.Power up
    on AC
    power?
    NY YN
    N
    YN
    N
    Y Y
    YN
    1. On some models there is a separate
    reset button.
    2. On some models the computer may be 
    reset using the Suspend switch and
    either the lid switch or the main power 
    switch. *NOTES:Go to
    Section 2.4,
    No Power,
    Part 3.Go to
    Section 2.3,
    No Power,
    Part 2.
    Go to
    Section 2.8,
    Nonfunctioning
    Docking Station. No Power 
    (power LED
    is off).
    268135-002.book  Page 12  Thursday, October 24, 2002  4:10 PM 
    						
    							Troubleshooting
    Maintenance and Service Guide2–13
    Flowchart 2.3—No Power, Part 2
    Continued from
    Section 2.2,
    No Power, Part 1.
    Visually check for
    debris in battery
    socket and clean
    if necessary.
    Done
    NY
    Power on? Check battery by
    recharging,
    moving it to
    another computer,
    or replacing it.
    Power on?
    Done
    Y
    Replace
    power supply
    (if applicable).
    N
    Power on?
    Done
    YN
    Go to
    Section 2.4,
    No Power,
    Part 3.
    268135-002.book  Page 13  Thursday, October 24, 2002  4:10 PM 
    						
    							2–14Maintenance and Service Guide
    Troubleshooting
    Flowchart 2.4—No Power, Part 3
    Continued from
    Section 2.3,
    No Power, Part 2.
    Reseat AC adapter
    in computer and
    at power source.
    Internal or
    external AC
    adapter? Done
    Done
    DoneDone 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
    Section 2.5,
    No Power,
    Part 4.
    268135-002.book  Page 14  Thursday, October 24, 2002  4:10 PM 
    						
    							Troubleshooting
    Maintenance and Service Guide2–15
    Flowchart 2.5—No Power, Part 4
    Y
    N
    Continued from
    Section 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*
    *NOTE: Replace these items as a set to 
    prevent shorting out among components.
    268135-002.book  Page 15  Thursday, October 24, 2002  4:10 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
    *NOTE: To change from internal to 
    external display, use the hotkey 
    combination.
    Y
    Go to
    Section 2.7,
    No Video, Part 2.
    268135-002.book  Page 16  Thursday, October 24, 2002  4:10 PM 
    						
    							Troubleshooting
    Maintenance and Service Guide2–17
    Flowchart 2.7—No Video, Part 2
    Y
    N
    Continued from
    Section 2.6,
    No Video, Part 1.
    Done
    Adjust external
    monitor display.Video OK?Adjust
    display
    brightness.
    Video OK?Video OK?
    DoneDone
    Check that notebook is properly
    seated in docking station, for 
    bent pins on cable, and for
    monitor connection.Go to “A” in
    Section 2.6,
    No Video, Part 1.Check brightness
    of external
    monitor.
    Try another
    external
    monitor.
    Internal
    and external
    video OK?
    Go to Section 2.8,
    Nonfunctioning
    Docking Station.
    YY
    Y N
    N
    N
    Remove 
    notebook from 
    docking station, 
    if connected.
    268135-002.book  Page 17  Thursday, October 24, 2002  4:10 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
    5. Docking motor mechanism
    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.
    268135-002.book  Page 18  Thursday, October 24, 2002  4:10 PM 
    						
    							Troubleshooting
    Maintenance and Service Guide2–19
    Flowchart 2.9—No Operating System (OS) Loading
    No OS loading
    from hard drive,
    go to
    Section 2.10.
    Reseat power
    cord in docking
    station and
    power outlet.
    No OS loading
    from diskette
    drive, go to
    Section 2.13.
    No OS loading
    from CD- or
    DVD-ROM drive,
    go to
    Section 2.14.
    No OS loading
    from network,
    go to
    Section 2.20.
    No OS
    Loading.*
    *NOTE: Before beginning troubleshooting, 
    always check cable connections, cable 
    ends, and drives for bent or damaged pins.
    268135-002.book  Page 19  Thursday, October 24, 2002  4:10 PM 
    						
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