Acer 4020 Peripheral-Related Symptoms, Keyboard/Touchpad-Related Symptoms, Modem-Related Symptoms

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Power Management-Related Symptoms

Symptom / Error	Action in Sequence

System hangs intermittently.	Reconnect hard disk/CD-ROM drives.
	Hard disk connection board
	System board

Peripheral-Related Symptoms

Symptom / Error	Action in Sequence

System configuration does not match the	Enter BIOS Setup Utility to execute “Load Default Settings”, then
installed devices.	reboot system.
	Reconnect hard disk/CD-ROM/diskette drives.

External display does not work correctly.	Press Fn+F5, LCD/CRT/Both display switching
	System board

USB does not work correctly	System board

Print problems.	Ensure the “Parallel Port” in the “Onboard Devices Configuration” of
	BIOS Setup Utility is set to Enabled.
	Onboard Devices Configuration
	Run printer self-test.
	Printer driver
	Printer cable
	Printer
	System Board

Serial or parallel port device problems.	Ensure the “Serial Port” in the Devices Configuration” of BIOS Setup
	Utility is set to Enabled.
	Device driver
	Device cable
	Device
	System board

Keyboard/Touchpad-Related Symptoms

Symptom / Error	Action in Sequence

Keyboard (one or more keys) does not work.	Reconnect the keyboard cable.
	Keyboard
	System board

Touchpad does not work.	Reconnect touchpad cable.
	Touchpad board
	System board

Modem-Related Symptoms

Symptom / Error	Action in Sequence

Internal modem does not work correctly.	Modem phone port
	modem combo board
	System board

NOTE: If you cannot find a symptom or an error in this list and the problem remains, see “Undetermined Problems” on page 79.

Chapter 4

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Contents Acer TravelMate 4020 Series Revision History Disclaimer CopyrightScreen Messages ConventionsPreface Page Chapter FeaturesStorage Battery Top View Mainboard PlacementRear View Description 5V / 3.3V Block DiagramDescription Outlook ViewOpen View Icon Description Front PanelLeft View Right View Power jack Connects to an AC adapter External display port Bottom View Indicators Easy-launch buttons Touchpad Basics TouchpadDesired action Num Lock on Num Lock off Using the KeyboardLock keys and embedded numeric keypad Lock Key DescriptionKey Description Hot KeysHot Key Function Description Special KeysUS dollar sign Euro symbolAcer eManager Using System UtilitiesLaunch Manager L2 Cache Hardware Specifications and ConfigurationsProcessor Specification System Board Major ChipsUSB Port Specification System Memory SpecificationLAN Interface Specification Modem/Bluetooth Interface SpecificationKeyboard Specification Pcmcia Port SpecificationMechanical Specifications Battery SpecificationPackage configuration LCD 15.4 Wxga SpecificationInput Requirements SpecificationsMechanical Specification AC Adapter SpecificationPower Management Acpi Mode Output Ratings CV modeOutput Ratings CC mode Dynamic Output CharacteristicsData Storage Physical Dimensions and Weight DetailsLogical Configuration Environmental RequirementsToshiba Reliability Characteristics Error Rates Nominal Power RequirementsPhysical & Environmental Specs Dimensions/Weight Ambient TemperaturePreventive Maintenance System Utilities Bios Setup UtilityParameter Description InformationUuid Main Advanced Security Boot ExitF12 Boot Menu Advanced Security Boot ExitParameter Description Option SecurityEnter Set Supervisor/User PasswordDisabled Characters 0-9,A-Z not case sensitiveSetup Notice Changes have been saved Continue Exit BootExit Info Main Advanced Security BootChapter Machine Disassembly and Replacement Before You Begin General InformationChapter Disassembly Procedure Flowchart Description Screw ListRemoving the Battery Pack Removing the HDD Module Removing the Memory and the Wireless LAN CardRemoving the Thermal Module and CPU Removing the ODD Module Removing the LCD Module Disassembling the Main Unit Disassembling the Upper Case Assembly Disassembling the Lower Case Assembly Chapter Disassembling the LCD Module Chapter Disassembling the Optical Drive Module Disassembling the External ModulesChapter Troubleshooting Keyboard or Auxiliary Input Device Check System Check ProceduresExternal Diskette Drive Check External CD-ROM Drive CheckMemory check Power System CheckTouchpad Check Power-on Self-Test Error Messages Error Message List Index of Error MessagesError Code List CPU ID No beep Error Messages FRU/Action in Sequence Code Beeps Post Routine Description Phoenix Bios Beep CodesCode Beeps Post Routine Description Chapter Code Beeps Post Routine Description 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 SymptomsModem-Related Symptoms Peripheral-Related SymptomsKeyboard/Touchpad-Related Symptoms Intermittent Problems Dimm Undetermined ProblemsChapter Top View Jumper and Connector LocationsRear View VGA RAM RTC Jumper FRU Field Replaceable Unit List Exploded Diagram Illustration Part Name Description Acer P/N Touch PAD Board ZL1A Touch PAD Lower Case W ZL3A Base Assy W/O DVD/CDRW Combo ZI6 Combo SBW-242C DVD Dual Drive ZL6 DVD Rwdual ZL1A K/B EUGO-U/I LCD Cable 15 ZL1A 15 LCD Cabel LCD Module 15 ZL1 15 LCD SXGA+ LCD Module 15.4 ZL1A 15.4 LCD Wxga Samsung LTN154X3 Samsung Panel UMA W/PCMCIA Slot CPU Memory Memory DDR333 Name Plate ZL3A Name Plate S Screw M2.5*4L-BZN ET2S Screw 100 Chapter