Acer 8431 manual Memory check, Power System Check

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Memory check

Memory errors might stop system operations, show error messages on the screen, or hang the system.

1.Boot from the diagnostics diskette and start the doagmpstotics program (please refer to main board.)

2.Go to the diagnostic memory in the test items.

3.Press F2 in the test items.

4.Follow the instructions in the message window.

NOTE: Make sure that the DIMM is fully installed into the connector. A loose connection can cause an error.

Power System Check

To verify the symptom of the problem, power on the computer using each of the following power sources:

1.Remove the battery pack.

2.Connect the power adapter and check that power is supplied.

3.Disconnect the power adapter and install the charged battery pack; then check that power is supplied by the battery pack.

If you suspect a power problem, see the appropriate power supply check in the following list:

‰“Check the Power Adapter” on page 53

‰“Check the Battery Pack” on page 53

Check the Power Adapter

Unplug the power adapter cable from the computer and measure the output voltage at the plug of the power adapter cable. See the following figure:

Pin 1: +19 to +20.5V

Pin 2: 0V, Ground

1.If the voltage is not correct, replace the power adapter.

2.If the voltage is within the range, do the following:

zReplace the System board.

zIf the problem is not corrected, see “Undetermined Problems” on page 68.

zIf the voltage is not correct, go to the next step.

NOTE: An audible noise from the power adapter does not always indicate a defect.

3.If the power-on indicator does not light up, check the power cord of the power adapter for correct continuity and installation.

4.If the operational charge does not work, see “Check the Battery Pack” on page 53.

Check the Battery Pack

To check the battery pack, do the following:

From Software:

1.Check out the Power Management in control Panel.

2.In Power Meter, confirm that if the parameters shown in the screen for Current Power Source and Total Battery Power Remaining are correct.

3.Repeat the steps 1 and 2, for both battery and adapter.

4.This helps you identify first the problem is on recharging or discharging.

Chapter 4

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Contents TravelMate 8471/8431 Series Service Guide Revision History Copyright Conventions Preface Page Table of Contents Jumper and Connector Locations Chapter FeaturesPower subsystem Environment CRT DiagramBlockSystemTop View Board LayoutBottom View Your Acer Notebook tour HDD Rear view Closed Front ViewRight View Left ViewBase view Touchpad Basics with fingerprint reader Touchpad basics with two-click buttons Lock Keys and embedded numeric keypad Using the KeyboardWindows Keys Hot Keys Acer Bio-Protection only for certain models Using the system utilitiesAcer GridVista dual-display compatible Acer Backup Manager Acer eRecovery Management Power managementBurn backup discs RestoreRestore Windows Vista from backup discs Hardware Specifications and Configurations Hard Disk Drive Interface Bluetooth InterfaceAudio Interface LCD panelKeyboard Power ManagementButton SoftwareSecurity Features LED Status IndicatorPhysical Characteristics System Utilities Bios Setup UtilityInformation Invoking Bios SetupMain Post Security Setting a Password Removing a Password Boot Exit Bios Flash Utility Machine Disassembly and Replacement Before You Begin General InformationMain unit disassembly flow chart Disassembly Procedure FlowchardLCM module disassembly flow chart Removing the Battery Pack Removing the HDD and RAM Remove the screw on RAM cover and remove RAM Remove the wireless card Remove ODD Chapter Remove Keyboard Remove FFC of main board and sub board Remove the FFC and screw on the Wireless board M2*54.5D*0.8T Remove Panel M2*44.5D*0.5T Disassembling the HDD Module Disassembling the External ModuleTroubleshooting External Diskette Drive Check System Check ProceduresExternal CD-ROM Drive Check Keyboard or Auxiliary Input Device CheckMemory check Power System CheckTouchpad Check Power-On Self-Test Post Error Message Error Code List Index of Error MessagesError Message List Cmos CRT InsydeH2O Bios Beep Codes Post device initialization 8Ah Initialize Extended Bios Data Area PnPnd dual Cmos optional LCD-Related Symptoms Index of Symptom-to-FRU Error MessageIndicator-Related Symptoms Power-Related SymptomsMemory-Related Symptoms PCMCIA-Related SymptomsSpeaker-Related Symptoms Power Management-Related SymptomsSymptom / Error Action in Sequence Keyboard/Touchpad-Related Symptoms Peripheral-Related SymptomsModem-Related Symptoms Intermittent Problems Undetermined Problems Top View Jumper and Connector LocationsBottom View FRU Field Replaceable Unit List TravelMate 8471/8431 Exploded Diagram Chapter Chapter Battery AccessoryTravelMate 8471/8431 FRU List AdapterLAN Intel Wlan 512AGHMWG Cable Camera CASE/COVER/BRACKET Assembly DVD RW Drive HDD/SSD Keyboard LCD Microphone Speaker Chapter