NEC NEC Computer Systems Division, Packard Bell NEC, Inc warranty Maintaining the LCD Quality

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Field Service Guidelines

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Do not drop the battery packs or subject them to excessive shock and vibration.

Do not expose the battery packs to direct sunlight, moisture, or chemical com- pounds.

Do not disassemble the battery packs.

Do not use the battery packs to power other devices.

Do not short the battery leads or connect the battery with reversed polarity.

Never attempt to charge the battery packs in any way other than as described in

Tthis manual and the user’s guide.

Always charge the battery packs as soon as possible after a low battery indication.

Maintaining the LCD Quality

Heat is the most common problem associated with the screen. After a lengthy work session, the typical routine is to shut down the machine and close the cover, but the display surface (no matter what type it is) and the components inside the computer radiate heat. So, when you close the cover, you will then trap this heat up against the screen. Leaving the computer cover open for about ten minutes while the heat disperses eliminates this potentially damag- ing situation.

REQUIRED TOOLS AND EQUIPMENT

All NEC Versa 2500 Series corrective maintenance procedures can be performed using the following tools:

tweezers

small flat-blade screwdriver

Tsmall Phillips screwdriver small Hex-bolt screwdriver.

NOTE: All boards, options and peripherals contain components that are sensitive to static electricity. When handling any of these items, protect against static discharge by using wrist or ankle grounding straps and grounded working mats. When moving or storing items, use the anti-static bags supplied with the items.

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Contents Sold by laptopia2005 do not Resell Preface Contents System Bios Upgrade Procedure Removing/Replacing the Heat Plate Assembly Removing/Replacing the LED BoardVGA Standard Modes VGA Extended Modes VGA High Refresh Modes List of Tables Viii Contents Sold by laptopia2005 do not Resell For United States Use Only Error checking and correction Bios Customized UtilityBios Upgrade Utility Direct memory accessPhase lock loop Service registerNational Authorized Service National Service ResponseVdc Volts, direct current Universal asynchronousReceiver/transmitter VoltIntel P54CSLM-133 Model ConfigurationConfiguration NEC Versa Feature Highlights Feature HighlightsSystem Configuration Diagram System ConfigurationMain Components Power Switch/LCD Cover SwitchStatus Panel and Power Indicator Quick Tour of the NotebookNormal keyboard operation Disables the alphanumeric keys where the embedAgain to disable the embedded keys and resume Ded keys are located. Press the Num Lock keyVersaGlide Fn Key Combination Summary cont’dPC Card Slot Compartment Right Side of the NotebookMemory Slot Compartment Built-in Disk DriveFront of the Notebook Battery CompartmentLeft Side of the Notebook Removing the Battery PackRear of the Notebook 11 Connecting an External Keyboard and PS/2 Mouse VGA Port Printer Port Bottom of the NotebookROM Memory Compartment Cover Battery Module Handle and LockBoot Setup Menu System Bios Setup ProgramOption is 3.5, 1.44 MB disk drive Boot Main Setup MenuBoot Setup Peripherals Menu Boot Main Setup Menu cont’dPassword on Re Boot Setup Security MenuFunction Password Password on BootStandby Time-out Boot Setup Power Savings MenuPower Saving 16 MB Memory Configurations System UpgradesMemory Upgrade Procedure Boot Setup Power Savings Menu cont’dSystem Bios Upgrade Procedure Sold by laptopia2005 do not Resell NEC Versa 2500 Series Specifications General SpecificationsNEC Versa 2500 Series Specifications cont’d Sold by laptopia2005 do not Resell AC 100V to 240V, 47/63Hz, 36W Max CD-ROM Versa Product MIXFollowing table lists the NEC Versa 2500 Series product mix Product MixMain Board Specifications System Board SpecificationsFollowing table lists system board specifications Following table lists Converter board specifications Transfer Board SpecificationsConverter Board Specifications Following table lists Transfer board specificationsLED Indicator Board Specifications LED Indicator Board SpecificationsFollowing table lists LED indicator board specifications I/O Board Specifications Board SpecificationsFollowing table lists I/O board specifications I/O Board Specifications cont’d Specification LCD Inverter Board SpecificationsFollowing table lists LCD inverter board specifications LCD Inverter Board SpecificationsStatus LED Descriptions LED Status IndicatorsDiskette Drive Specifications 10 Diskette Drive SpecificationsFollowing table lists the standard battery specifications HDD Unit SpecificationsCD-ROM Specifications Nimh Battery Pack SpecificationsFollowing table lists battery charger specifications DC/DC Converter & Battery Charger SpecificationsBattery Charger Specifications Following table lists AC/DC adapter specifications Keyboard SpecificationsAC/DC Adapter Specifications Following table lists keyboard specifications18 Bios Specifications Bios SpecificationsFollowing table lists Bios specifications MICRO-CONTROLLER Function Description Following table lists Micro-Controller specifications18 Bios Specifications cont’d 19 Micro-Controller SpecificationsMode Device Speed Power Management Features Mode DefinitionFollowing table lists power management specifications 20 Power Management Modes21 Mode Definitions Power Management Features Mode TransitionFollowing table lists power management transition modes Following table lists hot key definitions Environmental SpecificationsFollowing table lists appropriate operating temperatures HOT KEY DefinitionShock Specifications Power Source SpecificationsVibration Specifications 27 Electro-Static Discharge Specifications ELECTRO-STATIC Discharge ESD SpecificationsFollowing table lists static discharge specifications Hardware Functional Overview System Bios Functional Block DiagramMajor Functional Blocks System ProcessorSystem Logic Controller Sold by laptopia2005 do not Resell Subsystem Memory SubsystemDram Memory ROM MemoryVideo Chipset Controller Video SubsystemKeyboard Subsystem External VGA CapabilityHard Disk Subsystem Pcmcia Controller and SocketsPoin ING Device Subsystem Power SubsystemAC Power Adapter Diskette Drive Subsystem LCD Inverter Board Assembly Internal Battery Pack Power Board Cleaning the Notebook’s Exterior Preventive MaintenanceProtecting the Disk Drives Cleaning the Notebook’s InteriorHandling the Computer Battery Packs Required Tools and Equipment Maintaining the LCD QualityRemoving/Replacing the Notebook Battery Pack Parts Removal and Replacement ProceduresRemoving/Replacing the Diskette Drive Module Removing/Replacing the Hard Disk Drive ModuleRemoving/Replacing the LCD Status Bar Cover and Hinges Diskette Drive Module AssemblyRemoving/Replacing the CPU Removing/Replacing the KeyboardRemoving/Replacing the Heat Plate Removing/Replacing the Cover-Display LCD Assembly Module Removing/Replacing the LED Board Removing/Replacing the System Board and I/O Board LED Board Module AssemblySystem Board and I/O Boards Separating the System Board and I/O BoardI/O Board Module Assembly Removing/Replacing the Power BoardDescription Part Number Illustrated Parts BreakdownNEC Versa 2500 Series Field-Replaceable Parts Not shown in IPB figure NEC Versa 2500 Series Field-Replaceable Parts cont’dNEC Versa 2500 Series Illustrated Parts Breakdown Packaging and Documentation Part Numbers Packaging and DocumentationTechnical Support Service InformationNEC Service and Information Telephone Numbers Service CallOrdering Information from FastFacts Product InformationHelpful Starters Message Possible Cause Action POWER-ON Self Test PostPost Error Messages Post MessagesSetup Post Error Messages cont’dValue , read hex-value Informational Messages Bios Informational MessagesMessage Cause Action Run-time Error MessagesFollowing table lists run-time error messages Run-time Error MessagesProblem Corrective Actions Quick TroubleshootingQuick Troubleshooting Quick Troubleshooting cont’d Sold by laptopia2005 do not Resell Following table lists VGA standard modes Table A-1 VGA Standard Modes Text ModeVGA Standard Modes Table A-4 VGA Standard Modes Packed Pixel Mode Table A-2 VGA Standard Modes Graphics ModeTable A-3 VGA Standard Modes Planar Mode Table A-8 VGA Extended Modes 15-Bit Linear Mode Table A-5 VGA Extended Modes Text ModeTable A-6 VGA Extended Modes 4-Bit Linear Mode Table A-7 VGA Extended Modes 8-Bit Linear ModeTable A-12 VGA Extended Modes Packed Pixel Mode Table A-10 VGA Extended Modes 24-Bit Linear ModeTable A-11 VGA Extended Modes Planar Mode VGA High Refresh Modes Table A-13 VGA High Refresh Modes Packed Pixel ModeTable A-14 VGA High Refresh Modes Planar Mode Table A-15 VGA High Refresh Modes Packed Pixel ModeBattery Replacement Index Memory Index-3