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Acer Aspire 1420pt Service Guide

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    							Chapter 3141
    Replacing the SIM Card
    1.Insert the SIM card into the slot.
    Replacing the Battery
    1.Insert the battery outer edge into the slots.
    2.Push the battery down into place. 
    						
    							142Chapter 3
    3.Lock the battery.
    Replacing the Dummy Card
    1.Insert the dummy card into the slot. 
    						
    							Chapter 4143
    Troubleshooting
    Common Problems
    Use the following procedure as a guide for computer problems.
    NOTE: The diagnostic tests are intended to test only Acer products. Non-Acer products, prototype cards, or 
    modified options can give false errors and invalid system responses.
    1.Obtain the failing symptoms in as much detail as possible.
    2.Verify the symptoms by attempting to re-create the failure by running the diagnostic test or by repeating 
    the same operation.
    3.Use the following table with the verified symptom to determine which page to go to.
    4.If the Issue is still not resolved, see “Online Support Information” on page 165.
    Symptoms (Verified)Go To
    Power On Issue Page 144
    No Display Issue Page 145
    LCD Failure Page 147
    Internal Keyboard Failure Page 148
    TouchPad Failure Page 149
    Internal Speaker Failure Page 150
    Internal Microphone Failure Page 151
    USB Failure Page 153
    Other Function Failure Page 153
    Chapter 4 
    						
    							144Chapter 4
    Power On Issue
    If the system doesn’t power on, perform the following actions one at a time to correct the problem. Do not 
    replace non-defective FRUs:
    Computer Shuts down Intermittently
    If the system powers off at intervals, perform the following actions one at a time to correct the problem.
    1.Check the power cable is properly connected to the computer and the electrical outlet. 
    2.Remove any extension cables between the computer and the outlet.
    3.Remove any surge protectors between the computer and the electrical outlet. Plug the computer directly 
    into a known good electrical outlet. 
    4.Remove all external and non-essential hardware connected to the computer that are not necessary to 
    boot the computer to the failure point.
    5.Remove any recently installed software.
    6.If the Issue is still not resolved, see “Online Support Information” on page 165.
    Start
    Check
    AC/Battery
    Power onSwap AC /Battery
    to try
    OK
    NG
    Check
    Daughter/B &
    FFC Whether
    OK
    OK
    Swap Daughter/B
    Re-plug PWR FFC
    OK
    NG
    Swap M/B
    Start
    Check
    AC/Battery
    Power onSwap AC /Battery
    to try
    OK
    NG
    Check
    Daughter/B &
    FFC Whether
    OK
    OK
    Swap Daughter/B
    Re-plug PWR FFC
    OK
    NG
    Swap M/B
    Start 
    						
    							Chapter 4145
    No Display Issue
    If the Display doesn’t work, perform the following actions one at a time to correct the problem. Do not replace 
    non-defective FRUs:
    No POST or Video
    If the POST or video doesn’t display, perform the following actions one at a time to correct the problem.
    1.Make sure that the internal display is selected. On this notebook model, switching between the internal 
    display and the external display is done by pressing Fn+F5. Reference Product pages for specific model 
    procedures.
    2.Make sure the computer has power by checking at least one of the following occurs:
    • Fans start up 
    • Status LEDs light up
    If there is no power, see “Power On Issue” on page 144.
    3.Drain any stored power by removing the power cable and battery and holding down the power button for 
    10 seconds. Reconnect the power and reboot the computer.
    4.Connect an external monitor to the computer and switch between the internal display and the external 
    display is by pressing Fn+F5 (on this model). 
    If the POST or video appears on the external display, see “LCD Failure” on page 147.
    5.Disconnect power and all external devices including port replicators or docking stations. Remove any 
    memory cards and CD/DVD discs. Restart the computer.
    START
    Power On ?No
    Go to No Power
    troubleshooting
    step
    Replace external
    DDRAM module
    Remove and
    replace thermal
    moduleReplace the
    main board
    Reconnect
    SDRAM Module
    LCD Module OK?Replace LCD
    Panel and
    Cable
    Ext. DDRAM module
    connected properly?
    Ext. DDRAM
    module functional?
    CPU Thermal
    Module properly
    connected?
    No
    No
    No
    No 
    						
    							146Chapter 4
    If the computer boots correctly, add the devices one by one until the failure point is discovered.
    6.Reseat the memory modules.
    7.Remove the drives (see “Disassembly Process” on page 34).
    8.If the Issue is still not resolved, see “Online Support Information” on page 165.
    Abnormal Video Display
    If video displays abnormally, perform the following actions one at a time to correct the problem.
    1.Reboot the computer.
    2.If permanent vertical/horizontal lines or dark spots display in the same location, the LCD is faulty and 
    should be replaced. See “Disassembly Process” on page 34.
    3.If extensive pixel damage is present (different colored spots in the same locations on the screen), the LCD 
    is faulty and should be replaced. See “Disassembly Process” on page 34.
    4.Adjust the brightness to its highest level. See the User Manual for instructions on adjusting settings. 
    NOTE: Ensure that the computer is not running on battery alone as this may reduce display brightness.
    If the display is too dim at the highest brightness setting, the LCD is faulty and should be replaced. See 
    “Disassembly Process” on page 34.
    5.Check the display resolution is correctly configured:
    a.Minimize or close all Windows. 
    b.If display size is only abnormal in an application, check the view settings and control/mouse wheel 
    zoom feature in the application. 
    c.If desktop display resolution is not normal, right-click on the desktop and select 
    Personalize´ Display Settings. 
    d.Click and drag the Resolution slider to the desired resolution. 
    e.Click Apply and check the display. Readjust if necessary.
    6.Roll back the video driver to the previous version if updated.
    7.Remove and reinstall the video driver.
    8.Check the Device Manager to determine that:
    • The device is properly installed. There are no red Xs or yellow exclamation marks. 
    • There are no device conflicts. 
    • No hardware is listed under Other Devices.
    9.If the Issue is still not resolved, see “Online Support Information” on page 165.
    10.Run the Windows Memory Diagnostic from the operating system DVD and follow the onscreen prompts.
    11 .If the Issue is still not resolved, see “Online Support Information” on page 165.
    Random Loss of BIOS Settings
    If the computer is experiencing intermittent loss of BIOS information, perform the following actions one at a 
    time to correct the problem.
    1.If the computer is more than one year old, replace the CMOS battery.
    2.Run a complete virus scan using up-to-date software to ensure the computer is virus free.
    3.If the computer is experiencing HDD or ODD BIOS information loss, disconnect and reconnect the power 
    and data cables between devices.
    If the BIOS settings are still lost, replace the cables.
    4.If HDD information is missing from the BIOS, the drive may be defective and should be replaced. 
    5.Replace the Motherboard. 
    						
    							Chapter 4147
    6.If the Issue is still not resolved, see “Online Support Information” on page 165.
    LCD Failure
    If the LCD fails, perform the following actions one at a time to correct the problem. Do not replace non-
    defective FRUs:
    Start
    Check LCD
    module?Swap
    LCD cable /LCD panel
    OK
    NG
    Check MB LCD
    connector and
    cable ?
    OK
    Reassemble
    Re- plug LCD cable
    OK
    NG
    Swap M/B
    Start
    Check LCD
    module?Swap
    LCD cable /LCD panel
    OK
    NG
    Check MB LCD
    connector and
    cable ?
    OK
    Reassemble
    Re- plug LCD cable
    OK
    NG
    Swap M/B 
    						
    							148Chapter 4
    Built-In Keyboard Failure
    If the built-in Keyboard fails, perform the following actions one at a time to correct the problem. Do not replace 
    non-defective FRUs:
    Start
    Keyboard properly
    connected?NoDisconnect and
    reconnect
    Keyboard functioning?NoReplace Keyboard
    Replace
    mainboard 
    						
    							Chapter 4149
    TouchPad Failure
    If the To u c h P a d doesn’t work, perform the following actions one at a time to correct the problem. Do not 
    replace non-defective FRUs:
    Start
    Check M/B T/P 
    FFCRe-assemble the 
    T/P FFC to M/B
    OK
    NG
    Check 
    TouchPad
    OK
    Swap/Reassemble 
    the T/P board or 
    T/P FFC
    OK
    NG
    Swap M/B
    Start
    Check M/B T/P 
    FFCRe-assemble the 
    T/P FFC to M/B
    OK
    NG
    Check 
    TouchPad
    OK
    Swap/Reassemble 
    the T/P board or 
    T/P FFC
    OK
    NG
    Swap M/B 
    						
    							150Chapter 4
    Internal Speaker Failure
    If the internal Speakers fail, perform the following actions one at a time to correct the problem. Do not replace 
    non-defective FRUs:
    Sound Problems
    If sound problems are experienced, perform the following actions one at a time to correct the problem.
    1.Reboot the computer.
    2.Navigate to Start´ Control Panel´ System and Maintenance´ System´ Device Manager. Check 
    the Device Manager to determine that:
    • The device is properly installed. 
    • There are no red Xs or yellow exclamation marks. 
    • There are no device conflicts. 
    • No hardware is listed under Other Devices.
    3.Roll back the audio driver to the previous version, if updated recently.
    4.Remove and reinstall the audio driver.
    5.Ensure that all volume controls are set mid range:
    a.Click the volume icon on the taskbar and drag the slider to 50. Ensure that the volume is not muted.
    b.Click Mixer to verify that other audio applications are set to 50 and not muted.
    6.Navigate to Start´ Control Panel´ Hardware and Sound´ Sound. Ensure that Speakers are selected 
    as the default audio device (green check mark).
    NOTE: If Speakers does not show, right-click on the Playback tab and select Show Disabled Devices 
    (clear by default).
    7.Select Speakers and click Configure to start Speaker Setup. Follow the onscreen prompts to configure 
    the speakers.
    Start
    Check M/B SPK 
    cable Re-assemble the 
    SPK cable to M/B
    OK
    NG
    Check Logic 
    Upper/Logic 
    upper
    OK
    Swap Logic 
    lower/Logic upper
    OK
    NG
    Swap M/B
    Start
    Check M/B SPK 
    cable Re-assemble the 
    SPK cable to M/B
    OK
    NG
    Check Logic 
    Upper/Logic 
    upper
    OK
    Swap Logic 
    lower/Logic upper
    OK
    NG
    Swap M/B 
    						
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