NEC NEC Computer Systems Division, Packard Bell NEC, Inc warranty Removing/Replacing the Keyboard

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Field Service Guidelines

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Removing/Replacing the Keyboard

The procedure for removing and replacing the keyboard is as follows:

1.Turn off the computer. Follow all disassembly procedures mentioned from the start of this section.

2.Lift the keyboard out and tilt the upper edge of the keyboard towards you, but do not lift the keyboard away. Rest the keyboard (face down) on the palm rest area.

3.Remove the keyboard cable from the system board’s FPC type connector. To re- lease the keyboard cable from the connector, gently lift (using your fingernail or a thin pointed object) the connector locks on the left and right edge. Pull the key- board cable out and remove the keyboard from the notebook.

4.To replace the keyboard; rest the keyboard face-down on the palm rest area. In- sert the keyboard cable into the FPC type connector on the system board and tilt the keyboard back into place.

Removing/Replacing the Heat Plate

This is a heat shield for the CPU and power board. Remember, the CPU is in contact with this part, so be careful when removing it from the unit.

1.Turn off the computer. Follow all disassembly procedures mentioned from the start of this section.

2.Remove the six screws and carefully lift the heat pipe from the unit. (You do not need to remove this part if you are removing/replacing the LCD).

WARNING: The CPU is sometimes attached to the heat pipe, so be careful not to damage the pins or the CPU may be inoperable.

Removing/Replacing the CPU

The procedure for removing the CPU is as follows:

1.Turn off the computer. Follow all disassembly procedures mentioned from the start of this section.

2.The CPU is located at the left rear of the system base assembly under the heat pipe. The system board has been designed to allow the heat generated by the CPU to be released from the system.

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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 VoltModel Configuration Configuration NEC VersaIntel P54CSLM-133 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 BootBoot Setup Power Savings Menu Power SavingStandby Time-out 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 MixSystem Board Specifications Following table lists system board specificationsMain Board Specifications Following table lists Converter board specifications Transfer Board SpecificationsConverter Board Specifications Following table lists Transfer board specificationsLED Indicator Board Specifications Following table lists LED indicator board specificationsLED Indicator Board Specifications Board Specifications Following table lists I/O board specificationsI/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 SpecificationsDC/DC Converter & Battery Charger Specifications Battery Charger SpecificationsFollowing table lists battery charger specifications Following table lists AC/DC adapter specifications Keyboard SpecificationsAC/DC Adapter Specifications Following table lists keyboard specificationsBios Specifications Following table lists Bios specifications18 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 ModesPower Management Features Mode Transition Following table lists power management transition modes21 Mode Definitions Following table lists hot key definitions Environmental SpecificationsFollowing table lists appropriate operating temperatures HOT KEY DefinitionPower Source Specifications Vibration SpecificationsShock Specifications ELECTRO-STATIC Discharge ESD Specifications Following table lists static discharge specifications27 Electro-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 SubsystemInternal Battery Pack Power BoardLCD Inverter Board Assembly Cleaning the Notebook’s Exterior Preventive MaintenanceCleaning the Notebook’s Interior Handling the Computer Battery PacksProtecting the Disk Drives 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 Keyboard Removing/Replacing the Heat PlateRemoving/Replacing the CPU 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 BoardIllustrated Parts Breakdown NEC Versa 2500 Series Field-Replaceable PartsDescription Part Number 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 MessagesQuick Troubleshooting Quick TroubleshootingProblem Corrective Actions Quick Troubleshooting cont’d Sold by laptopia2005 do not Resell Table A-1 VGA Standard Modes Text Mode VGA Standard ModesFollowing table lists VGA standard modes Table A-2 VGA Standard Modes Graphics Mode Table A-3 VGA Standard Modes Planar ModeTable A-4 VGA Standard Modes Packed Pixel 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-10 VGA Extended Modes 24-Bit Linear Mode Table A-11 VGA Extended Modes Planar ModeTable A-12 VGA Extended Modes Packed Pixel 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

NEC Versa 2500 Series User's Guide 25-10584-00, NEC Computer Systems Division, Packard Bell NEC, Inc specifications

NEC Computer Systems Division was a prominent entity in the realm of personal computing, renowned for its innovative products and advanced technologies. One of its most notable contributions to the market was the Packard Bell NEC, Inc., a brand that combined the strengths of two industry giants to offer cutting-edge computing solutions. Among the various products offered by this partnership, the NEC Versa 2500 Series stood out as a noteworthy achievement, embodying a blend of portability, performance, and user-centric design.

The NEC Versa 2500 Series was designed primarily for business and professional users who required a reliable and efficient mobile computing solution. Its main features included a sleek and lightweight design, making it easy for users to carry the device wherever their work took them. The laptop was equipped with a robust Intel processor, delivering commendable performance for a variety of applications, from word processing to graphics design.

One of the defining characteristics of the Versa 2500 Series was its versatility. Featuring a modular bay design, users could customize their system with a variety of add-ons such as additional drives, batteries, or even a second hard drive. This allowed professionals to tailor their device to better meet their specific needs, enhancing productivity on the go.

In terms of display, the NEC Versa 2500 Series boasted a vibrant screen that provided clear and bright visuals, essential for presentations and detailed work. The keyboard was ergonomic, ensuring comfortable typing for extended periods, a crucial aspect for business users who often found themselves working long hours. Additionally, the laptop included a range of connectivity options, such as USB ports, a floppy disk drive, and expansion slots, making it easy to link with other devices and peripherals.

The NEC Versa 2500 Series also incorporated advanced technologies that enhanced its performance and user experience. Its energy-efficient design contributed to longer battery life, allowing users to work uninterrupted even while traveling. The inclusion of NEC’s proprietary software solutions further optimized the device's performance, ensuring smooth operation and increased efficiency.

In summary, the NEC Versa 2500 Series, under the umbrella of NEC Computer Systems Division and Packard Bell NEC, Inc., offered a compelling combination of features, technologies, and characteristics that catered to the needs of mobile professionals. With its emphasis on portability, modularity, and efficiency, the Versa 2500 Series solidified its position as a preferred choice for those seeking a dependable mobile computing solution in the competitive landscape of the late 1990s and early 2000s.
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