Acer VD.T25V7.001 manual Intermittent Problems

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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 diagnostic test for several times to isolate the problem.

2.If no error is detected, do not replace any FRU.

3.If any error is detected, replace the FRU. Rerun the test to verify that there are no more errors.

If an error is detected by the main battery test, see “Check the Power Adapter” on page 66

If an error is detected by the display test, see “Index of Symptom-to-FRU Error Message” on page 72 .

If an error is detected by the floppy disk drive test, see “External Diskette Drive Check” on page 64.

If an error is detected by the keyboard test, see “Keyboard or Auxiliary Input Device Check” on page 65.

Chapter 4

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Contents Acer TravelMate 800 Series Revision History Date Chapter UpdatesDisclaimer CopyrightScreen Messages ConventionsPreface Page Table of Contents Appendix C Online Support Information 105 Index 107 Chapter TroubleshootingTravelMate 800 Series Main Features Appendix B Test Compatible ComponentsChapter FeaturesKeyboard and Pointing Device Block Diagram OZ711MI BiosBoard Layout Top ViewBottom View Icon Description Outlook ViewFront Open View Front Panel Left Panel Right Panel Rear Panel Bottom Panel Icon Function Description IndicatorsLock Key Description Lock KeysEmbedded Numeric Keypad Desired Access Num Lock On Num Lock OffKey Icon Description Windows KeysHot Key Icon Function Description Hot KeysBrightness up Increases the screen brightness Click on Start, Settings, Control Panel Euro SymbolLaunch Keys Launch Key Default applicationMail Detection Function Left Button Right Button Scroll Button Tap TouchpadTouchpad Basics Second Level Cache Hardware Specifications and ConfigurationsSpecification ProcessorLAN Interface Modem/Bluetooth InterfaceMemory Combinations DVD-ROM 8X QSI SDR-083 Hard Disk Drive InterfaceDVD-ROM Interface MHS2030ATVideo Interface Combo Drive InterfaceAudio Interface USB Port Video MemoryParallel Port Ieee 1394 PortLCD Inverter BatterySystem Board Major Chips KeyboardTFT AC AdapterQDI QD141X1LH12 Environmental Requirements Power ManagementMechanical Specification Address Map VGA BiosMemory Address Map DMA Channel Assignment IRQ Assignment MapChapter System Utilities Bios Setup UtilityNavigating the Bios Utility Parameter Description InfoMain Parameter Description Format/Option DMA 1/DMA System DevicesParameter Description Options IRQ 5/IRQParameter Description Option SecurityClear or Set Chapter Removing a Password Boot Exit Bios Flash Utility System Diagnostic Diskette Chapter Machine Disassembly and Replacement Before You Begin General InformationDisassembly Procedure Flowchart CPU Frame NUT Screw ListRemoving the Battery Pack Removing the ODD Module Removing the Memory Removing the Keyboard Removing the Function Key Board Chapter Removing the Touchpad Removing the Thermal Module Disassembling the LCD Module Disassembling External Modules Disassembling the HDD Module Chapter Symptoms Verified Go To TroubleshootingExternal CD-ROM/DVD-ROM Drive Check System Check ProceduresExternal Diskette Drive Check Keyboard or Auxiliary Input Device Check Memory Check Power System CheckCheck the Power Adapter Display Check Touchpad CheckSound Check Power-On Self-Test Post Error Message Setup Index of Error MessagesError Message List Error Messages FRU/Action in Sequence02F0 CPU ID Power-Related Symptoms Index of Symptom-to-FRU Error MessageLCD-Related Symptoms Indicator-Related SymptomsPower Management-Related Symptoms PCMCIA-Related SymptomsMemory-Related Symptoms Speaker-Related SymptomsLCD FPC Peripheral-Related SymptomsKeyboard/Touchpad-Related Symptoms Modem-Related SymptomsIntermittent Problems Dimm Undetermined ProblemsError Message Action in Sequence Index of AFlash Bios Error MessageChapter FRU Field Replaceable Unit List Exploded Diagram LCD DVD Assy HDD W/O HDD Assy 512MB Infineon HYS64D64020GBDL-7-B 64MX64 System256MB Infineon HYS64D32020 GDL-7-B 512MB Micron MT16VDDS6464HG-265B4LCD Latch KIT W/SPRING LCD Bracket 14.1 Left W/HINGELCD Bracket 15 Left W/HINGE LCD Panel with LogoDVD-RW Combo Module 24X KME UJDA740 HDD CoverHDD Case Combo Drive DVD Assy DVD-RW Combo Module 24X QSI SBW-242FFC Touchpad T/P BOARD-- T/P---SHORT System 84KEYS Keyboard Darfon UK NSK-A640U 85KEYS85KEYS Cables System FFC Touchpad M/B-- T/P BOARD-- LongModem /BLUETOOTH Combo Board Ambit Communication Module Wireless LAN Antenna SETBluetooth Antenna Cable Bluetooth LineCASE/COVER/BRACKET Assembly BatterySystem Battery Simplo LI-ION 8CELL Battery Pack Battery Sanyo LI-ION 6CELL ModelSystem IO Shielding Front BezelUpper Case Assy W/ Touchpad Lower Case Assy W/O SpeakerScrew I2*3M-NIHY M2L3 ScrewsScrew NUT IO EA1 MBEA1001, REV3B Screw CPU NUT ZG1SMBZG1001,REV3AChapter Chapter TravelMate 800 Series Appendix aMain Features Appendix B Test Compatible ComponentsParallel Port SpecificationsMicrosoft Windows XP Environment Test MonitorsFLASH/32MB ScsiMHS2030AT USB CD-ROM USB PortSilitek K/B USB HDDAudio Jacks USB HUBPCI USB HUB USB CCDMicrosoft Windows 2000 Environment Test Appendix B 101 USB HUB PCI USB HUB Appendix B 103 104 Appendix C Online Support Information106 Index Bios