Home > Acer > Notebook > Acer Travelmate 720 Service Guide

Acer Travelmate 720 Service Guide

    Download as PDF Print this page Share this page

    Have a look at the manual Acer Travelmate 720 Service Guide online for free. It’s possible to download the document as PDF or print. UserManuals.tech offer 720 Acer manuals and user’s guides for free. Share the user manual or guide on Facebook, Twitter or Google+.

    							Chapter 4 93
    Keyboard (one or more keys) 
    does not work.1.  Reseat the keyboard cable.
    2.  Keyboard
    3.  System board
    Power shuts down during 
    operation.1.  Battery
    2.  AC Adapter
    3.  DC/DC & Charge board
    4.  System board
    The system will not power-
    on.1.  Battery
    2.  AC adapter
    3.  DC/DC & Charge boar
    4.  System board
    The system will not power-
    off.1.  DC/DC & Charge board
    2.  System board
    Battery can’t be charged. 1.  Battery
    2.  DC/DC & Charge board
    3.  IDE board
    4.  System board
    System cannot detect the 
    PCMCIA.PCMCIA slots assembly
    System board
    Memory count (size) 
    appears different from actual 
    size.1.  Enter BIOS Utility to execute load setup default 
    settings, then reboot system.
    2.  DIMM
    3.  System board
    Speakers have noise or no 
    sound comes from system.1.  Speaker
    2.  System board
    The system will not enter 
    Hibernation.1.  Keyboard (if control is from the keyboard)
    2.  Hard disk
    3.  System board
    The system will not enter 
    Standby after closing the 
    LCD.1.  LCD cover switch
    2.  System board
    Battery fuel gauge does not 
    go higher than 90%.1.  Remove battery pack and let it cool for 2 hours.
    2.  Refresh battery (continue to use battery until 
    power off, then charge battery).
    3.  Battery
    4.  DC/DC & charge board
    5.  System board
    System configuration does 
    not match the installed 
    devices.1.  Enter BIOS Utility to execute load setup default 
    settings, then reboot system.
    2.  Reseat CD-ROM/DVD module.
    System hangs intermittently. 1.  Hard Disk/CD-ROM/DVD drive connector
    2.  Fan
    3.  System board
    Symptom / ErrorFRU / Action in Sequence
    720.book  Page 93  Saturday, March 6, 1999  10:00 AM 
    						
    							94 Troubleshooting
    In DOS or Windows 
    multimedia programs, no 
    sound comes from the 
    computer. 1.  Speaker
    2.  System board
    External display does not 
    work correctly.System board
    USB does not work correctly. System board
    Print problems 1.  Run printer self-test.
    2.  Printer driver
    3.  Printer cable
    4.  System board
    Serial or parallel port device 
    problems1.  Device driver
    2.  Device cable
    3.  Device
    4.  System board
    Symptom / ErrorFRU / Action in Sequence
    720.book  Page 94  Saturday, March 6, 1999  10:00 AM 
    						
    							Chapter 4 95
    Intermittent Problems
    Intermittent system hang problems can be caused by a variety of reasons 
    that have nothing to do with a hardware defect, such as: cosmic radiation, 
    electrostatic discharge, or software errors. FRU replacement should be 
    considered only when a recurring problem exists.
    When analyzing an intermittent problem, do the following:
    1.  Run the advanced diagnostic test for the System board in loop mode at 
    least 10 times.
    2.  If no error is detected, do not replace any FRU.
    3.  If any error is detected, replace the FRU shown by the FRU code. Rerun 
    the test to verify that no more errors exist.
    720.book  Page 95  Saturday, March 6, 1999  10:00 AM 
    						
    							96 Troubleshooting
    Undetermined Problems
    You are here because the diagnostic tests did not identify which adapter or 
    device failed, installed devices are incorrect, a short circuit is suspected, or 
    the system is inoperative. Follow these procedures to isolate the failing FRU 
    (do not isolate a nondefective FRU).
    Note: 
    Verify that all attached devices are supported by the computer.
    Note: 
    Verify that the power supply being used at the time of the failure is 
    operating correctly (See “Power Systems Checkout”).:
    1.  Power off the computer.
    2.  Visually check them for damage. If any problems are found, replace the 
    FRU.
    3.  Remove or disconnect all of the following devices:
    a.  Non-Acer devices
    b.  Devices attached to the port replicator
    c.  Printer, mouse, and other external devices
    d.  Battery pack
    e.  Hard disk drive
    f.   DIMM 
    g.  CD-ROM
    h.  Diskette drive
    i.   PC Cards
    4.  Power on the computer.
    5.  Determine if the problem has changed.
    6.  If the problem does not recur, reconnect the removed devices one at a 
    time until you find the failing FRU.
    7.  If the problem remains, replace each following FRU one at a time. Do not 
    replace a nondefective FRU:
    a.  System board
    b.  LCD assembly
    c.  CPU card
    720.book  Page 96  Saturday, March 6, 1999  10:00 AM 
    						
    							Chapter 4 97
    Utility Program Diskette
    Setting LCD Panel ID
    There is an EEPROM in the inverter which stores its supported LCD type ID 
    code. If you replace an LCD with one of a different brand or use a new 
    inverter, the ID information in the inverter EEPROM should be updated.
    Follow the steps below to see the LCD Panel ID:
    1.  Follow the instructions on-screen to read current or to set new LCD Panel 
    ID code.
    Note: 
    When you set a new LCD Panel ID and the new LCD is not yet 
    enabled (to function), connect an external CRT to see the 
    program execution process.
    Note: 
    Make sure the new ID code you choose corresponds with the LCD 
    brand and type. If you write a wrong ID into the inverter, just 
    reboot and re-execute the program and input the correct ID code.
    2.  Restart the computer - the new LCD should work normally.
    Note: 
    If LCD cannot display after changing the ID code, make sure you 
    write the correct ID code, or try reseating the LCD FPC cable 
    connectors.
    Setting Thermal Sensor Utility
    The system is equipped with sensors to protect against system overheating. 
    By setting System and processor thermal thresholds, the system can turn on 
    the cooling fan or shut down automatically when temperatures reach the 
    defined threshold parameters.
    720.book  Page 97  Saturday, March 6, 1999  10:00 AM 
    						
    							98 Troubleshooting
    Running the Diagnostics
    Running PQA Diagnostics Program
    Note: 
    Before running the PQA Diagnostics Program, make sure that the 
    write enable tab of the Diagnostic Program Diskette is set to 
    enabled.
    Press -> or 
    						
    							Chapter 4 99
    Auto Test performs multiple tests of the selected items and automatically 
    checks the selected test items in sequence.
    Note:  PCMCIA Diagnostic Supports the Manual test only. Do not select 
     PCMCIA Diagnostic in Auto Test.
    720.book  Page 99  Saturday, March 6, 1999  10:00 AM 
    						
    							100 Troubleshooting
    The screen below appears if you select AUTO Test.
    Specify the desired number of tests and press Enter. After you specify the 
    number of tests to perform, the screen shows a list of test items (see below):
    . 
    Move the highlight bar from one item to another. Press space to enable or 
    disable the item. Press Enter to view the available suboptions of each 
    selected item. Press Esc to close the submenu.
    The right corner screen information gives you the available function keys and 
    the specified test number.
    •  Space Enables/disables the item
    •  ESC Exits the program
    •  F1 Help
    •  F2 Tests the selected item(s)
    •  Enter Opens the available suboptions
    •  Test Times Indicates the number of tests to perform.
    Note: The F1 and F2 keys function only after you finish configuring the 
    Test option.
    PQA                                        Vx_x     xx-xx-xx
    DiagResult
    SysInfoOption
    Exit
    DiagMANUAL TEST
    AUTO      TEST
    TEST COUNT VALUE (1...9999) 1
    PQA                                        Vx_x     xx-xx-xx
    DiagResoult
    SysInfoOption
    ExitDiagMANUAL TEST
    AUTO      TESTTest Items
    [ ] Sytem Board
    [ ] Memory 
    [ ] Keyboard
    [ ] Video
    [ ] Parallel Port
    [ ] Serial Port
    [ ] Diskette Drive
    [ ] Hard Disk
    [ ] CD-ROM
    [ ] Coprocessor
    [ ] Pointing Dev.
    [ ] Cache
    SPACE: mark/ummark selecting item
    ESC    : return to upper menu
    F2       : test the marked item(s)
    ENTER: open subitem’s menu
    Test Times = 1
    720.book  Page 100  Saturday, March 6, 1999  10:00 AM 
    						
    							Chapter 4 101
    PQA Diagnostics Program Error Codes and Messages
    Error CodeMessageFRU/Action in Sequence
    System
    16XX Backup battery error Backup battery
    1XXX CPU or System board 
    error1.  Reload BIOS default setting.
    2.  CPU
    3.  System board
    2XXX Memory error 1.  Reseat CPU (IMM module).
    2.  DIMM
    3.  System board
    3XXX Keyboard error 1.  Reseat Keyboard.
    2.  Keyboard
    3.  System board
    4XXX Video error System board
    5XXX Parallel Port error System board
    6XXX Serial port or System 
    board errorSystem board
    7XXX Diskette drive error 1.  Diskette drive
    2.  System board
    8XXX Hard disk error 1.  Reload BIOS default setting.
    2.  Hard disk
    3.  System board
    9XXX CD-ROM error 1.  Reseat CD-ROM cable.
    2.  CD-ROM drive
    3.  System board
    10XXX CPU or System board 
    error1.  CPU
    2.  System board
    11XXX Pointing device error 1.  Reseat Keyboard.
    2.  Keyboard
    3.  System board
    720.book  Page 101  Saturday, March 6, 1999  10:00 AM 
    						
    							102 Troubleshooting
    720.book  Page 102  Saturday, March 6, 1999  10:00 AM 
    						
    All Acer manuals Comments (1)

    Related Manuals for Acer Travelmate 720 Service Guide