ThinkPad 310, 310D, 310E, 310ED

Hardware Maintenance Manual

February 1998

Requests for technical information about IBM products should be made to your IBM reseller or IBM marketing representative.

ii IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

The manual is divided into sections as follows:

??The Introduction section provides general information, guidelines, and safety information required to service computers.

??The product-specific section includes service, reference, and product-specific parts information.

Important

This manual is intended for trained servicers who are familiar with ThinkPad products. Use this manual

along with the advanced diagnostic tests to troubleshoot problems effectively.

iii

Related Publications

The following mobile product publications are available through IBM or your IBM Authorized Dealer.

Related Diskettes

The following diskettes are available through IBM or your IBM Authorized Dealer.

iv IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

Contents

vi IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

Introduction

Attention

The drive startup sequence in the computer you are servicing might have been changed. Be extremely careful during write operations such as copying, saving, or formatting. Data or programs can be overwritten if you select an incorrect drive.

How to Use Error Messages

Use the error codes displayed on the screen to diagnose

first error code can result in false error codes being

highlighted in this index. Some digits will represent different information for SCSI errors versus non-SCSI errors.

The following example shows which digits display the shorter POST error messages and also defines the SCSI information in an eight-digit error message.

All SCSI devices are set to a different SCSI ID.

viii IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

Safety Notices (Multi-lingual

Translations)

Introductionix

Algunas bater??as de reserva contienen una peque??a cantidad de n??quel y cadmio. No las desmonte, ni recargue, ni las eche al fuego o al agua ni las cortocircuite. Des??chelas tal como dispone la normativa local. Utilice s??lo bater??as que se

encuentren en la lista de piezas. La utilizaci??n de una bater??a no apropiada puede provocar la ignici??n o explosi??n de la misma.

x IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

La batteria contiene piccole quantit?? di nichel. Non smontarla, gettarla nel fuoco o nell'acqua n?? cortocircuitarla. Smaltirla secondo la normativa in vigore (DPR 915/82, successive disposizioni e

disposizioni locali). Quando si sostituisce la batteria, utilizzare soltanto i tipi inseriti nell'appropriato Catalogo parti. L'impiego di una batteria non adatta potrebbe determinare l'incendio o l'esplosione della batteria stessa.

Introductionxi

xii IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

Introductionxiii

Safety Notice 7

Though main batteries have low voltage, a shorted or grounded battery can produce enough current to burn combustible materials or personnel.

xiv IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

Introductionxv

Safety Information

The following section contains the safety information that you need to be familiar with before servicing an IBM mobile computer.

General Safety

Follow these rules to ensure general safety:

??Observe good housekeeping in the area of the

??Do not perform any action that causes hazards to the

customer, or that makes the equipment unsafe.

??Before you start the machine, ensure that other

or metal fasteners for your clothing.

Attention: Metal objects are good electrical conductors.

??Wear safety glasses when you are: hammering,

drilling soldering, cutting wire, attaching springs, using

solvents, or working in any other conditions that might be hazardous to your eyes.

??After service, reinstall all safety shields, guards,

labels, and ground wires. Replace any safety device that is worn or defective.

??Reinstall all covers correctly before returning the machine to the customer.

xvi IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

Electrical Safety

Observe the following rules when working on electrical equipment.

??Find the room emergency power-off (EPO) switch, disconnecting switch, or electrical outlet. If an electrical accident occurs, you can then operate the

??If you need to work on a machineexposedthat has

electrical circuits, observe the following precautions:

???Ensure that another person, familiar with the power-off controls, is near you.

Attention: Another person must be there to switch off the power, if necessary.

???Use only one hand when working with

Introductionxvii

??Do not touch live electrical circuits with the reflectiv

surface of a plastic dental mirror. The surface is

???Pumps

Safety Inspection Guide

The intent of this inspection guide is to assist you in

personnel from injury. This guide addresses only those items. However, good judgment should be used to identify potential safety hazards due to attachment of non-IBM

Consider these conditions and the safety hazards they present:

??Electrical hazards, especially primary power (primary voltage on the frame can cause serious or fatal

electrical shock).

?? Explosive hazards, such as a damaged CRT face or

bulging capacitor

??Mechanical hazards, such as loose or missing hardware

xviii IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

The guide consists of a series of steps presented in a checklist. Begin the checks with the power off, and the power cord disconnected.

Introductionxix

Handling Electrostatic

Discharge-Sensitive Devices

Any computer part containing transistors or integrated

circuits (ICs) should be considered sensitive to electrosta discharge (ESD). ESD damage can occur when there is a difference in charge between objects. Protect against ESD

When handling ESD-sensitive parts:

??Keep the parts in protective packages until they are

??Prevent the part from touching your clothing. Most

???Use the round ground-prong of the AC plug on AC-operated computers.

Grounding Requirements

Electrical grounding of the computer is required for operator safety and correct system function. Proper grounding of the electrical outlet can be verified by a certified electrician.

xx IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

When a CD-ROM drive is installed, note the following.

Werden Steuer- und Einstellelemente anders als hier festgesetzt verwendet, kann gef??hrliche Laserstrahlung auftreten.

Introductionxxi

puede provocar la exposici??n a radiaciones peligrosas.

Opening the CD-ROM drive could result in exposure to hazardous laser radiation. There are no serviceable parts

xxii IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

ThinkPad 310, 310D, 310E, 310ED (2600)

Read This First

Before you go to the checkout guide, be sure to read section.

caused by either FRU. Before replacing multiple FRUs, tr removing or exchanging each FRU, one by one in the

Before checking problems with the computer, determine whether or not the damage applies to the warranty by

referring to the following:

Note for Warranty:

During the warranty period, the customer may be responsible for repair costs if the computer damage was caused by misuse, accident, modification, unsuitable

and some symptoms that may indicate the system was

??Cracked or broken plastic parts, broken latches, broken pins, or broken connectors caused by excessive force.

??Diskette drive damage caused by pressing the diskette drive cover or inserting diskettes with

multiple labels.

??Damaged or bent diskette eject button.

??CD-ROM drive damage caused by excessive

force, shock, or by being dropped.

?? Fuses blown by attaching a nonsupported device.

??Forgotten computer password (making computer unusable.)

2 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

??Missing parts may be a symptom of unauthorized

service or modification.

??HDD spindles can become noisy if subjected to

excessive force or by being dropped.

How to Disable the Power-On Password:

To clear a password from the system, first identify the

1. Power-off the computer.

2. Unplug the AC Adapter and remove the main battery.

3.Remove the keyboard and thermal plate. See

???Keyboard??? on page 41 and ???Thermal Plate/CPU??? on page 42.

4.Move the switch from Enable to Disable to bypass the password.

7. Power off.

8. Unplug the power cable or battery.

9. Move the password switch from Disable to Enable.

Note: To reinstall the password, the user must enter a password in the BIOS Utility.

Checkout Guide

Use the following procedure as a guide for computer problems.

Note: The diagnostic tests are intended to test only IBM products. Non-IBM products, prototype cards, or modified options can give false errors and invalid system responses.

1. Obtain the failing symptoms in as much detail as possible.

ThinkPad 310, 310D, 310E, 310ED (2600)3

2. Verify the symptoms by attempting to re-create the failure by running the diagnostic test or by repeating the same operation.

3. Use the following table with the verified symptom to determine which page to go to. Search the

symptoms column and find the description that best

Memory Checkout

DIMMs are available for increasing memory capacity.

Warning: This system will not work without DIMM memory installed.

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

1. Power-off the computer and replace the DIMM.

4 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

To update the flash memory, do the following:

1. Get the appropriate diskette containing the update.

3. Select Update system programs from the menu.

System Board Checkout

The processing functions are performed by the system board. Processor problems can also be caused by the system board.

Keyboard and External Input Device

Checkout

Note: If an external keyboard is attached, remove it if internal keyboard is to be tested.

If the internal keyboard does not work or an unexpected character appears, make sure that the flexible cable extending from the keyboard is correctly seated in the connector on the keyboard connection board on the

system board.

?? Ensure the keyboard switch is correctly set

?? Reseat the keyboard flexible cables

?? Replace the keyboard connection board

?? Replace the keyboard assembly

??Replace the system board

The following external input devices are supported for this computer:

??Numeric keypad

If any of these devices do not work, reseat the cable

??Audio board

??System board

has exceeded its normal temperature range. This symptom does not indicate a hardware problem. No

3. PressF2 in the test items.

4. Press the left and right click buttons.

??Reseat the keyboard flexible cables and the

TrackPoint flexible cable.

??Reseat the flexible cable connecting the TrackPoint

board via the system board.

??Replace the TrackPoint board (under the click buttons).

?? Replace the keyboard.

??Replace the system board.

Do the following to select the test device:

2. Go to the diagnostic Diskette Drive in the test item

3. Press F2 in the test items.

4. Follow the instructions in the message window.

If an error occurs with the internal diskette drive, res connector on the system board.

If the error still remains:

1. Reseat the diskette drive cable.

2. Replace the diskette drive cable.

ThinkPad 310, 310D, 310E, 310ED (2600)7

3. Replace the diskette drive flexible cable.

4. Replace the system board.

If an error occurs when the external diskette drive is

1. Replace the external FDD cable.

2.Replace the diskette drive.

3.Replace the system board.

Do the following to select the test device:

2. Go to the diagnosticCD-ROM in the test items.

3. PressF2 in the test items.

4. Follow the instructions in the message window.

If an error occurs, reseat the connector on the system board.

If the error still remains:

1. Reseat the CD-ROM cable.

2. Replace the CD-ROM drive.

3. Replace the system board.

?? Checking the AC Adapter

?? Checking Operational Charging

?? Checking the Battery Pack

8 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

1. Unplug the AC Adapter cable from the computer and measure the output voltage at the plug of the AC

Adapter cable.

??Replace the system board.

??If the problem is still not corrected, go to

3. Plug the AC Adapter cable into the AC power outlet.

4. Measure the output voltage of the AC Adapter.

5.If the voltage is still not correct, replace the AC Adapter.

ThinkPad 310, 310D, 310E, 310ED (2600)9

Checking Operational Charging:To check

operational charging, use a discharged battery pack or a

1.Power-off the computer.

2.Remove the battery pack and measure the voltage between battery terminals 1(+) and 6 (-). See the following figure:

BIOS Utility

Your computer has a BIOS Utility that allows you to

The BIOS Utility has the following functions:

?? Change the system date or time

?? Set the power-saving modes and timers

?? Set, change, or remove a system password

?? Change the system boot drive or display device

?? Add or remove serial and parallel devices

??Set the video display features

There are four main menu items:

?? Basic System Settings

??System Security

?? Power Management Settings

??Load Setup Default Settings

ThinkPad 310, 310D, 310E, 310ED (2600)11

Power Management Features

Two power management modes are provided by the computer to reduce power consumption and prolong battery power.

Standby Mode: When in standby mode, the following occurs:

?? The LCD backlight turns off.

??The hard disk motor stops.

Events that cause the computer to enter standby mode:

??The battery condition is low and hibernation is not

enabled (when Sleep Manager is not installed and the

12 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

Events that cause the computer to exit standby mode:

Note: If the computer enters standby mode and the

??The system is powered off.

Events that cause the computer to enter hibernation mode:

?? Hibernation requested by the Fn key. (Fn+F8)

?? The specified time (hibernation timer in the BIOS

Utility) has elapsed from the last operation with the

Events that cause the computer to exit hibernation mode:

??The power-on switch is operated.

ThinkPad 310, 310D, 310E, 310ED (2600)13

Symptom-to-FRU Index

2.DIMM

3.System board

14 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

2.Diskette drive cable

3.Diskette drive

2.Diskette drive cable

3.Diskette drive

2.Diskette drive cable

3.Diskette drive

3.Hard disk drive

4.System board

3.Hard disk drive

4.System board

16 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

Beep Symptoms

4.Charger board

5.Hard disk drive

8.LCD inverter

9.LCD

10.System board

8.LCD inverter

9.LCD

10.System board

6.LCD inverter

7.LCD

8.System board

LCD-Related Symptoms

18 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

7.LCD inverter

8.LCD

9.System board

??Screen abnormal

??Wrong color displayed

Keyboard/TrackPoint-Related

Symptoms

4.TrackPoint board

5.Keyboard

6.System board

ThinkPad 310, 310D, 310E, 310ED (2600)19

Indicator-Related Symptoms

Power-Related Symptoms

2.AC Adapter

3.Charger board

4.System board

3.Charger board

4.System board

2.Battery

3.Charger board

4.System board

PC Card (PCMCIA)-Related Symptoms

Memory-Related Symptoms

3.DIMM

4.System board

20 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

Speaker-Related Symptoms

Power Management-Related Symptoms

3.Boot an operating system and press Fn+F8 and see if the computer enters hibernation mode.

4.Keyboard connector board

5.Keyboard

6. Hard disk connector board

7.Hard disk drive

8.System board

Peripheral-Device-Related Symptoms

Intermittent Problems

Intermittent system hang problems can be caused by a variety of reasons that have nothing to do with a hardwar defect, such as cosmic radiation, electrostatic discharge, software errors. FRU replacement should only be

considered when a recurring problem exists.

When analyzing the intermittent problem, do the following:

Undetermined Problems

incorrect, a short circuit is suspected, or the system i inoperative. Follow the procedures below to isolate the

1.Power-off the computer.

2.Check the cables, wires, and connectors for short circuits and open circuits. Visually check them for

damage. If any problems are found, replace the

FRU.

3. Remove or disconnect all of the following devices:

??Non-IBM devices

??Printer, external mouse, keyboard, and other external devices

??Battery pack

??DIMM

??PC Card(PCMCIA)

4. Power-on the computer.

5. Determine if the problem has changed.

6. If the problem does not occur again, reconnect the removed devices one at a time until you find the failing FRU.

?? Keyboard Connector Board

??Charger Board

?? Audio Connector Board

??LCD Assembly

??System Board

ThinkPad 310, 310D, 310E, 310ED (2600)23

Related Service Procedures

This section provides information about the following:

?????Status Indicators.???

Status Indicators

The system status LED indicators show the current computer status in green and amber using symbols. The

24 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

Power Switch

The system has no Power Shutdown Switch. If the computer cannot be turned off by pressing the power

Diagnostic Program Diskette

Diagnostic Program Diskette contains the following two programs:

?? PQA Diagnostic Program

??Fan Diagnostic Program

Running PQA Diagnostics Program

Important: Before running PQA Diagnostic Program, make

sure that the write enable tab of the Diagnostic Program Diskette is set to enable.

??CD-ROM, Any data and audio CDs

ThinkPad 310, 310D, 310E, 310ED (2600)25

?? ThinkPad 310 Diagnostics Diskette (P/N 05L1936)

??ThinkPad 310 Maintenance Utility Diskette (P/N 05L1770)

??Manual Test Performs a single test and checks the selected test items in sequence.

26 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

Specify the desired number of testsEnter . and press

The right corner screen information gives you the available function keys and the specified test number.

ThinkPad 310, 310D, 310E, 310ED (2600)27

Note: The F1 and F2 keys function only after you finish configuring the Test option.

turn on and the test fails, replace the FRU shown by the

diagnostic error code.

2.CD-ROM drive

3.System board

28 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

1. Boot from the Diagnostic Program Diskette.

2. Select Fan Diagnostics from PC DOS 7.0 Startup

Menu.

3. Follow the instruction on screen to execute fan diagnostics.

Note: If test failed, try reseating the fan connector or replacing the fan.

Fn Key Combinations

The following table shows the Fn key and function key

30 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

ThinkPad 310, 310D, 310E, 310ED (2600)31

Product Overview

32 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

FRU Removals and Replacements

This section contains information about removals and replacements.

??Do not damage any parts. Only certified and trained

personnel should service the computer.

parts, are in place and are not left loose inside the

ThinkPad 310, 310D, 310E, 310ED (2600)33

34 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

I/O Door

Battery Pack and Battery Pack Door

Reverse the steps above to install a battery pack.

ThinkPad 310, 310D, 310E, 310ED (2600)35

Note: Make sure you use the correct screw when replacing.

Reverse the steps above to install a hard disk drive.

36 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

Warning: Do not drop or apply any shock to the hard disk drive. The hard disk drive is sensitive to physical shock.

ThinkPad 310, 310D, 310E, 310ED (2600)37

DIMM and DIMM Door

Turn the computer upside down.

38 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

Side View

Hinge Cover

ThinkPad 310, 310D, 310E, 310ED (2600)39

Note: Make sure you use the correct screw when replacing.

40 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

Keyboard

??Hinge Covers (5)

When replacing the keyboard unit, connect the keyboard connector as shown in the figure; then replace the

ThinkPad 310, 310D, 310E, 310ED (2600)41

Thermal Plate/CPU

?? Hinge Covers (5)

??Keyboard Unit (6)

42 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

ThinkPad 310, 310D, 310E, 310ED (2600)43

Diskette Drive/CD-ROM Drive

??Thermal plate / CPU (7)

44 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

those specified may result in hazardous radiation exposure.

Figure A

Figure B

ThinkPad 310, 310D, 310E, 310ED (2600)45

you need to perform an extra step as shown in the

46 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

LCD Removal and Replacement

??Hinge Covers (5)

LCD Display Module

Note: Make sure you use the correct screw when replacing.

ThinkPad 310, 310D, 310E, 310ED (2600)47

LCD Bezel:

Note: When removing the LCD, take note of the following:

2.The LCD cover has several latches. Release these

latches; then remove the LCD cover. Be careful not to break the latches.

Note: Make sure you use the correct screw when replacing.

48 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

Note: Make sure you use the correct screw when replacing.

ThinkPad 310, 310D, 310E, 310ED (2600)49

LCD Right Hinge and LCD Diaper

Note: Make sure you use the correct screw when

replacing.

50 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

Inside Assembly

?? Hinge Covers (5)

?? Keyboard Unit (6)

?? LCD Unit (9)

?? Thermal plate and CPU (7)

Upper Base

(3)silver

ThinkPad 310, 310D, 310E, 310ED (2600)51

TrackPoint Board, TrackPoint Button and

TrackPoint Board FPC Cable

Note: Make sure you use the correct screw when replacing.

52 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

Fan

need to get from the Mylar FRU the following: the tape

Warning: When removing the fan, do not tilt the fan too much to any one side. The post that steadies the fan is

delicate and will break if too much pressure is exerted

it. Take care in removing the fan, it should be done as vertically as possible.

ThinkPad 310, 310D, 310E, 310ED (2600)53

Audio Connector Board

54 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

Battery Connector Board

Note: Make sure you use the correct screw when

replacing.

ThinkPad 310, 310D, 310E, 310ED (2600)55

Speaker and Cover Switch Cables

56 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

Lower Base

ThinkPad 310, 310D, 310E, 310ED (2600)57

Note: Make sure you use the correct screw when replacing.

58 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

PCMCIA Door and PCMCIA Door Spring

ThinkPad 310, 310D, 310E, 310ED (2600)59

Charger Board

Note: Make sure you use the correct screw when replacing.

60 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

Note: Make sure you use the correct screw when replacing.

ThinkPad 310, 310D, 310E, 310ED (2600)61

62 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

Keyboard Connector Board

ThinkPad 310, 310D, 310E, 310ED (2600)63

PCMCIA Slot Assembly

Note: Make sure you use the correct screw when replacing.

64 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

Locations

Front View

ThinkPad 310, 310D, 310E, 310ED (2600)65

Bottom View

.1/ DIMM door

66 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

Rear View

ThinkPad 310, 310D, 310E, 310ED (2600)67

Switch Locations

There are two switches on the system board.

??CPU speed

??Keyboard select, password enable/disable and BIOS screen select

and another switch on the DC-DC converter.

??CPU voltage

Refer to the figure and tables below on how to set thes switches.

CPU Settings

68 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

Keyboard Language (SW2, Switch 1 and

2)Settings

ThinkPad 310, 310D, 310E, 310ED (2600)69

310 - System Unit Parts Listing

70 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

310D - System Unit Parts Listing

ThinkPad 310, 310D, 310E, 310ED (2600)71

72 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

ThinkPad 310, 310D, 310E, 310ED (2600)73

74 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

310/310D LCD Unit Parts Listing

ThinkPad 310, 310D, 310E, 310ED (2600)75

76 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

310E System Unit Parts Listing

ThinkPad 310, 310D, 310E, 310ED (2600)77

310ED System Unit Parts Listing

78 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

ThinkPad 310, 310D, 310E, 310ED (2600)79

80 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

ThinkPad 310, 310D, 310E, 310ED (2600)81

310E/310ED LCD Unit Parts Listing

82 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

ThinkPad 310, 310D, 310E, 310ED (2600)83

310E (2600-Axx/Cxx/Exx/Fxx) System

Unit Parts Listing

84 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

310ED (2600-Bxx/Dxx) System Unit

Parts Listing

ThinkPad 310, 310D, 310E, 310ED (2600)85

310E/310ED (2600-Axx/Bxx/Cxx/Dxx/Exx/Fxx) System Unit FRU List

86 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

ThinkPad 310, 310D, 310E, 310ED (2600)87

88 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

310E/310ED LCD Unit Parts Listing

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90 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

310/310E/310D/310ED Miscellaneous and Other Parts

Miscellaneous

ThinkPad 310, 310D, 310E, 310ED (2600)91

92 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

ThinkPad 310, 310D, 310E, 310ED (2600)93

Others

94 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM

Notices

intended to state or imply that only that IBM product,

program, or service may be used. Subject to IBM??s valid intellectual property or other legally protectable rights, a

functionally equivalent product, program, or service may be

used instead of the IBM product, program, or service. Th

Trademarks

Intel, Pentium, and MMX are trademarks or registered trademarks of Intel Corporation.

Other company, product, and service names may be trademarks or service marks of others.

ThinkPad 310, 310D, 310E, 310ED (2600)95

IBM???

Part Number: 05L1935

Printed in U.S.A.

S??5L-1935-????