Apple macintosh portable Service Manual

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Service Source

Macintosh Portable

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Service Source

Basics

Macintosh Portable

Basics Overview - 1

Overview

This manual contains
complete repair procedures
for the Macintosh Portable
shown at left.

Figure: Macintosh Portable

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Service Source

Specifications

Macintosh Portable

Specifications Processor - 1

Processor

CPU

Addressing

Wait States

Motorola 68HC000, 16-bit CMOS microprocessor

15.6672 MHz

32-bit internal registers
24-bit address bus
16-bit data bus

1 (static logic board)
10 (pseudostatic logic board)

Specifications Memory - 2

Memory

RAM

ROM

PRAM

VRAM

1 MB using thirty-two 32K by 8-bit static RAM chips; 100 ns

access time; addressing supports up to 9 MB
Expandable to 2 MB with optional 1 MB RAM expansion card
Expandable to 4 MB with optional 3 MB RAM expansion card

(backlit model)

256K using two 128K by 8-bit devices; 150 ns access time;

addressing supports up to 4 MB

128 bytes of system parameter memory

32K of static video display memory

Specifications Disk Storage - 3

Disk Storage

Floppy Drive

Hard Drive

Internal 1.4 MB floppy drive

Internal 40 MB hard drive (optional)

Specifications I/O Interfaces - 4

I/O Interfaces

Floppy Drive

SCSI

Apple Desktop Bus

Serial

Modem

DB-19 connector
Supports Macintosh 800K Disk Drive, Apple 3.5 Drive, Apple

SuperDrive, and Apple Hard Disk 20

1.5 MB/second transfer rate
Supports a maximum of eight devices

Low-speed serial interface
Supports optional low-power mouse

Two RS-422 serial ports; mini DIN-8 connectors

Phone jack for optional external modem

Specifications I/O Interfaces - 5

Power Adapter

Sound

Video

Power adapter port

Stereo sound-in port

DA-15 connector
Supports the connection of external video devices

Specifications I/O Devices - 6

I/O Devices

Keyboard

Low-Power ADB Mouse

Trackball

63 keys
N-key rollover
Apple Desktop Bus (ADB) interface
US, British, French Canadian, Japanese, German, Spanish,

French, Swedish, and Italian versions available

Low-power version of the ADB mouse
Opto-mechanical type
ADB interface

ADB interface

Specifications I/O Devices - 7

Numeric Keypad (Optional)

18 keys
ADB interface
US, Pacific, and European versions available

Specifications Sound and Video - 8

Sound and Video

Sound Generator

Video Display

Apple Sound Chip
One-or four-voice mono (one or two voices in stereo) with 4-bit

digital-to-analog conversion using a 22-kHz sampling rate
Filtered by two Sony sound chips

10-in. (diagonal) screen
Reflective, active-matrix, liquid crystal, flat-panel display
640 by 400 pixels, 75 dpi
.28 mm dot size; .33 mm dot pitch; 80% active area
Variable tilt
Contrast (nonbacklit display) and brightness (backlit display) is

software adjustable using the Control Panel.

Specifications Electrical - 9

Electrical

Main Battery

Backup Battery

Power Adapter

Input voltage:
Output voltage:

Sealed lead-acid

6.5 V
Up to 10 hours (fully charged battery); time depends on system

configuration and power management settings

9 V transistor

85–270 VAC (100/240 nominal), 48–62 Hz (50/60 nominal)

7.0–7.6 V (7.5 nominal), 5 mA–2.0 A (1.5 nominal)
US, Japanese, United Kingdom, Australian, and European versions

Specifications Electrical - 10

Battery Recharger (Optional)

Input voltage: 7.5 VAC
Battery recharger output voltage: 6.5 VDC

Specifications Physical - 11

Physical

Dimensions (Display Open)

Weight (With Battery)

Width: 15.25 in. (387.35 mm)
Height: 11.0 in. (279.4 mm)
Depth: 14.83 in. (365.25 mm)
Height at rear panel: 4.05 in. (102.87 mm)
Height at front panel: 2.10 in. (53.34 mm)

13.75 lb. (6.25 kg) without hard drive

15.75 lb. (7.16 kg) with hard drive

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Service Source

Troubleshooting

Macintosh Portable

Troubleshooting General - 1

General

The Symptom Charts included in this chapter will help you
diagnose specific symptoms related to your product. Because cures
are listed on the charts in the order of most likely solution, try
the first cure first. Verify whether or not the product continues to
exhibit the symptom. If the symptom persists, try the next cure.
(Note: If you have replaced a module, reinstall the original module
before you proceed to the next cure.)

If you are not sure what the problem is, or if the Symptom Charts
do not resolve the problem, refer to the Flowchart for the product
family.

For additional assistance, contact Apple Technical Support.

Troubleshooting Symptom Charts/Power - 2

Symptom Charts

Power

Screen is blank;
computer is not
responding

1 If computer is new, remove plastic sheet from between

battery and contacts.

2 Reset power manager.
3 Connect power adapter and restart computer in three or four

minutes.

4 Replace main battery.
5 Check keyboard cable connections.
6 Replace keyboard.
7 Replace keyboard cable.
8 Replace logic board. Retain customerÕs SIMMs.

Troubleshooting Symptom Charts/Power

(Continued)

- 3

After main battery is
removed, some
Control Panel settings
are different

Power adapter is
plugged in and
connected; battery DA
does not indicate
charger is connected

Power

1 Did you replace battery cover after removing main battery?

2 Replace backup battery.

1 Verify that charger is connected properly.
2 Replace main battery.
3 Replace power adapter.
4 Replace logic board. Retain customerÕs SIMMs.

(Continued)

If so, power interruption destroyed settings. Restore

contents of Control Panel.

Troubleshooting Symptom Charts/Power

(Continued)

- 4

Low-power warning
appears soon after
you start to use
computer

Battery does not
retain charge, even
when computer is not
in use

Power

1 Attach power adapter.
2 Make sure peripherals display low-power icon.
3 Reduce use of power-consuming devicesÑfor example, floppy

1 Upgrade to system software 6.0.5 or later.
2 Replace battery.
3 Replace keyboard.
4 Replace wire harness assembly.
5 Replace logic board.

(Continued)

drive, hard drive, modem, and speakerÑor connect power

adapter.

Troubleshooting Symptom Charts/Video - 5

Video

Some pixels never
come on; no pattern

Some pixels are
always black; no
pattern

Row of pixels is
always black

Row of pixels never
blackens

If display contains six or more voids, replace LCD display.
Maximum of five permanently OFF pixels (voids) is acceptable.

If any pixel is on constantly, replace LCD display.

1 Replace LCD display.
2 Replace display cable.
3 Replace logic board. Retain customerÕs SIMMs.

1 Replace LCD display.
2 Replace display cable.
3 Replace logic board. Retain customerÕs SIMMs.

Troubleshooting Symptom Charts/Video

(Continued)

- 6

Video

Display is blurred 1 Adjust angle of display.

2 Use Control Panel to adjust screen contrast.

Display is too dark 1 Move computer closer to direct light or move light source

2 Use Control Panel to adjust screen contrast.
3 Replace LCD display.
4 Replace logic board. Retain customerÕs SIMMs.

Display is too light 1 Adjust angle of display.

2 Use Control Panel to adjust screen contrast.
3 Replace LCD display.

(Continued)

closer to computer.

Troubleshooting Symptom Charts/Video

(Continued)

- 7

Backlight level cannot
be changed

Backlight does not
operate

Display is blank,
though computer
appears to operate
correctly

Video

Use version 1.3 of Portable CDEV.

1 Use version 1.3 of Portable CDEV.
2 Check inverter PCA connections.
3 Replace inverter PCA. Refer to ÒLCD Display (Backlit)Ó in

4 Replace LCD Display.
5 Replace logic board. Retain customerÕs SIMMs.

1 Check display cable connection.
2 Replace LCD display.
3 Replace display cable.
4 Replace logic board. Retain customerÕs SIMMs.

(Continued)

Take Apart.

Troubleshooting Symptom Charts/Floppy Drive - 8

Floppy Drive

Audio and video are
present, but internal
drive does not operate

Disk ejects while
booting; display
shows Mac icon with
blinking ÒXÓ

1 Replace floppy disk.
2 Replace floppy drive.
3 Replace floppy drive cable.
4 Replace logic board. Retain customerÕs SIMMs.

1 Replace bad system disk with known good.
2 Replace floppy drive.
3 Replace floppy drive cable.
4 Replace logic board. Retain customerÕs SIMMs.

Troubleshooting Symptom Charts/Floppy Drive

(Continued)

- 9

Floppy Drive

Disk does not eject 1 Shut down computer, press and hold trackball or mouse

button, and switch on computer.

2 Eject disk manually by pushing opened paper clip into hole

near drive.

3 Replace floppy drive.
4 Replace floppy drive cable.
5 Replace logic board. Retain customerÕs SIMMs.

Disk initialization
fails

1 Verify that disk is Apple-certified.
2 Replace floppy disk.
3 Replace floppy drive.
4 Replace logic board. Retain customerÕs SIMMs.

(Continued)

Troubleshooting Symptom Charts/Hard Drive - 10

Hard Drive

Internal hard drive
does not operate

1 Switch on external SCSI devices connected to Portable.
2 Check hard drive cable connection.
3 Use HD SC Setup to see whether drive is visible. If it is,

reinitialize drive.

4 Replace hard drive.
5 Replace logic board. Retain customerÕs SIMMs.

Troubleshooting Symptom Charts/Peripherals - 11

Peripherals

After external SCSI
device is connected,
computer no longer
boots

Cursor does not move
when you use
trackball

1 Switch on external SCSI device before starting computer.
2 Verify that cable termination is correct.
3 Verify that no two SCSI devices have same device address.
4 Replace logic board. Retain customerÕs SIMMs.

1 Reset power manager.
2 Check cable connections between trackball and logic board.
3 Replace trackball cable.
4 Replace trackball.
5 Replace logic board. Retain customerÕs SIMMs.

Troubleshooting Symptom Charts/Peripherals

(Continued)

- 12

Cursor intermittently
does not move or
moves erratically

Cursor does not move
when you use mouse.

Cursor moves, but
clicking button has no
effect

Peripherals

1 Clean trackball ball and internal rollers.
2 Replace trackball.

1 Check mouse connection to ADB port.
2 Reset power manager.
3 Clean mouse ball and inside mouse.
4 Replace mouse.
5 Replace logic board. Retain customerÕs SIMMs.

1 If trackball button isnÕt working, replace trackball cable. If

mouse button doesnÕt work, replace mouse.

2 Replace trackball ball.
3 Replace logic board. Retain customerÕs SIMMs.

(Continued)

Troubleshooting Symptom Charts/Peripherals

(Continued)

- 13

No response to any
key on keyboard

Known-good
ImageWriter,
ImageWriter II, or LQ
doesnÕt print

Known-good
LaserWriter doesnÕt
print

Peripherals

1 Reset power manager by pressing reset and interrupt

switches simultaneously.

2 Check keyboard connection to logic board.
3 Replace keyboard.
4 Replace logic board. Retain customerÕs SIMMs.

1 Verify that System is 6.0.5 or later.
2 Verify Chooser settings.
3 Replace printer cable.
4 Replace logic board. Retain customerÕs SIMMs.

1 Verify that System is 6.0.5 or later.
2 Verify Chooser settings.
3 Replace printer. If new printer works, computer is OK.
4 Replace logic board. Retain customerÕs SIMMs.

(Continued)

Troubleshooting Symptom Charts/Peripherals

(Continued)

- 14

Device connected to
modem port doesnÕt
work

Serial devices are
unrecognized or
garbage is
transmitted and/or
received

Peripherals

1 Verify that External Modem is selected in the Portable CDEV.
2 Verify that System is 6.0.5 or later.
3 Replace logic board. Retain customerÕs SIMMs.

1 Use version 1.0 of Portable INIT.
2 Upgrade to system software 6.0.5 or later.

(Continued)

Troubleshooting Symptom Charts/Peripherals

(Continued)

- 15

When using an
external modem: after
exiting a
communication
application and
putting the computer
to sleep three or four
times, the computer
freezes when it comes
out of system sleep

Peripherals

Upgrade to system software 6.0.5 or later.

(Continued)

Troubleshooting Symptom Charts/Internal Modem - 16

Internal Modem

Internal modem
options do not appear
in Portable CDEV
when modem is
installed

Modem does not
respond properly to
AT instructions

Modem interferes
with system sound

1 Reseat modem card.
2 Replace modem card.
3 Replace logic board. Retain customerÕs SIMMs.

1 Verify that baud rate and data format settings of

communications application are compatible with Portable

Data Modem 2400 and remote modem.

2 Replace modem card.

1 Replace modem card.
2 Replace logic board. Retain customerÕs SIMMs.

Troubleshooting Symptom Charts/Internal Modem

(Continued)

- 17

Modem does not
respond to incoming
call

Modem has no sound
output

Internal Modem

1 If system doesnÕt respond to incoming call during sleep mode,

select When Phone Rings option in Automatic Wake-up

section of Portable CDEV .

2 Replace modem card.
3 Replace logic board. Retain customerÕs SIMMs.

Replace modem card.

(Continued)

Troubleshooting Symptom Charts/Miscellaneous - 18

Miscellaneous

Screen goes blank and
computer shuts down
every few minutes

Some applications
seem to run slower
after few seconds

Hard disk is slow to
respond, or screen
goes blank too often

Adjust sleep delay in Control Panel or connect power adapter.

Disable system rest.

Adjust sleep delay in Control Panel or connect power adapter.

Troubleshooting Symptom Charts/Miscellaneous

(Continued)

- 19

Miscellaneous

Speaker doesnÕt work 1 Verify that volume setting in Control Panel is 1 or above.

2 Check speaker connection to logic board.
3 Replace speaker.
4 Replace logic board. Retain customerÕs SIMMs.

Screen suddenly goes
blank

Error chords sound
during startup

Press any key except Caps Lock.

Replace logic board. Retain customerÕs SIMMs.

(Continued)

Troubleshooting Symptom Charts/Macintosh Portable Startup Problems

Macintosh Portable Startup Problems Flowchart 1

START

Reset power
manager.

Turn on system without
startup disk (press any key
except <Caps Lock>).

Do

startup tones

sound?

Yes

Is

startup tone

normal?

Yes

Is gray

pattern

displayed?

Yes

1

No

No

No

Is any

video

displayed?

1. Replace speaker.

2. Replace logic board.

Replace logic board.

1. Verfiy that display
cable is connected.

2. Replace LCD display.

3. Replace display cable.

4. Replace logic board.

Yes

No

1. Replace keyboard.

2. Replace keyboard cable.

3. Replace logic board.

Go to Start

Troubleshooting Symptom Charts/Macintosh Portable Startup Problems

Macintosh Portable Startup Problems Flowchart 2

1

Is

disk icon

with question

mark

displayed?

Yes

Insert System Tools
in floppy drive.

No

Replace logic board.

Go to Start

Does
desktop
appear?

Yes

Do

trackball and

button function

correctly?

Yes

END

Do

No

No

you hear

sounds from

disk drive?

Yes

1. Use known-good startup disk.

2. Replace disk drive.

3. Replace disk drive cable.

4. Replace logic board.

1. Reset power manager.

2. Replace trackball.

3. Replace trackball cable.

4. Replace logic board.

1. Replace keyboard.

No

2. Replace keyboard cable.

3. Replace logic board.

Go to Start

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Service Source

T ak e Apart

Macintosh Portable

Take Apart Rear Cover - 1

Rear Cover

No preliminary steps are
required before you begin
this procedure.

Rear Cover

Review the ESD precautions
in Bulletins/Safety.

Take Apart Rear Cover - 2

Press the two plastic cover
latches, pivot the rear of the
cover up, and lift off the
rear cover.

Rear Cover

Take Apart Keyboard Cover - 3

Keyboard Cover

No preliminary steps are
required before you begin

Keyboard

Cover

this procedure.

Review the ESD precautions
in Bulletins/Safety.

1 Push the carrying handle

toward the computer and
open the display.

Take Apart Keyboard Cover - 4

2 Position the computer

upright on the rear
panel.

3 Insert the tip of a

screwdriver under the
center of each foot;
gently lift the foot away
from the case and

Foot

remove it.

Take Apart Keyboard Cover - 5

4 Insert a jeweler’s

screwdriver into the
center hole at the top­right corner of the
bottom case. Push in the
screwdriver and unsnap
the corner of the
keyboard cover.

5 Repeat this step to

unsnap the left corner
of the keyboard cover.

Take Apart Keyboard Cover - 6

6 Place the computer flat

on the grounded surface.

7 Starting at the edges and

working toward the
center, slide your index
fingers between the
bottom case and the
keyboard cover until the
cover releases.

Note:

Two latches attach the
center of the cover to the
bottom case, so you’ll feel
some resistance as you lift
the center cover.

Take Apart Main Battery - 7

Main Battery

Before you begin, remove
the rear cover.

Review the ESD precautions
in Bulletins/Safety.

Main Battery

Caution:

is a sealed, lead-acid battery
that contains toxic
materials. Review battery
handling and disposal
instructions in Bulletins/
Safety.

The main battery

Take Apart Main Battery - 8

1 Press the two plastic

tabs at the front of the
battery cover and slide
the battery cover
toward the rear of the
computer.

2 Lift out the main

battery.

Battery Cover

Main Battery

Caution:

You must reinstall
the battery cover if you are
doing anything other than
replacing the main battery.
Failure to reinstall the
cover leaves power
connected to the logic board
and could damage new and old
modules.

Take Apart Backup Battery - 9

Backup Battery

Before you begin, remove
the following:

• Rear cover

• Main battery cover

Caution: Review the ESD

precautions in Bulletins/
Safety.

Backup Battery

Take Apart Backup Battery - 10

Note:

Removing the backup
battery erases the contents
of parameter RAM. Before
removing the backup
battery, be sure to note all
the Control Panel settings
so you can restore them
after completing your
repairs.

Take Apart Backup Battery - 11

1 Using the tip of a

jeweler’s screwdriver,
lift the edge of the
backup battery far
enough to grab the
battery with your
fingers. Remove the
battery from its
compartment.

2 Disconnect the battery

cable from the battery.

Backup Battery

Component

Take Apart Hard Drive - 12

Hard Drive

Before you begin, remove
the following:

• Rear cover

• Main battery

• Keyboard cover

• All option cards

Hard Drive

Caution:

precautions in Bulletins/
Safety.

Review the ESD

Take Apart Hard Drive - 13

Caution:

replace the battery cover
after removing the main
battery. Failure to put the
cover on leaves power
connected to the logic board.
Removing and replacing
modules with power
available could damage any
module.

Remember to

Take Apart Hard Drive - 14

1 Disconnect the following

cable connectors from
the logic board:

• Display cable from
J19

• Hard drive cable from
J18

Hard

Drive

Take Apart Hard Drive - 15

2 Close the display and

move the hard drive
cable toward the rear of
the computer.

3

Caution:

Do not loosen
or remove the Torx
screws that attach the
hard drive to the drive
shield. Doing so could

Plastic Latch

irreparably damage the
hard drive.

Hard

Drive

Plastic Latch

Hard Drive
Cable

Unsnap the two plastic
latches and remove the
hard drive (with
shield) from the
subframe.

Take Apart Hard Drive - 16

Replacement Note:

information on removing the
hard drive form the carrier
and returning drives,
cables, and carriers to
Apple, refer to Additional
Procedures in the Hard
Drives Manual.

For

Take Apart Upper Floppy Drive - 17

Upper Floppy Drive

Before you begin, remove
the following:

• Rear cover

• Main battery

• All option cards

Upper Floppy Drive

Caution:

precautions in Bulletins/
Safety.

Review the ESD

Take Apart Upper Floppy Drive - 18

Caution:

replace the battery cover
after removing the main
battery. Failure to
reinstall the cover leaves
power connected to the logic
board. Removing and
replacing modules with
power available could
damage any modules.

Remember to

Take Apart Upper Floppy Drive - 19

1 Disconnect the floppy

drive cable from the
floppy drive.

2 Unsnap the two plastic

latches and remove the
floppy drive (with
retainer) from the
subframe.

3 Depress the two metal

Plastic Latch

tabs and remove the
floppy drive mechanism

Upper

Floppy

Drive

Floppy Drive
Cable

Plastic Latch

from the retainer.

Take Apart Upper Floppy Drive - 20

Replacement Note:

you install a replacement

1.4 MB SuperDrive, you
must remove the dust shield.

Before

Take Apart Lower Floppy Drive - 21

Lower Floppy Drive

Before you begin, remove
the following:

• Rear cover

• Main battery

• All option cards

• Upper floppy drive (if
installed)

• Hard drive (if installed)

Lower Floppy
Drive

Caution:

precautions in Bulletins/
Safety.

Review the ESD

Take Apart Lower Floppy Drive - 22

Caution:

replace the battery cover
after removing the main
battery. Failure to
reinstall the cover leaves
power connected to the logic
board. Removing and
replacing modules with
power available could
damage any modules.

Remember to

Take Apart Lower Floppy Drive - 23

1 Disconnect the floppy

drive cable from the
floppy drive.

2 Remove the floppy drive

from the subframe.

Lower

Floppy

Drive

Floppy Drive
Cable

Replacement Note:

Before

you install a replacement

1.4 MB SuperDrive, you

must remove the dust shield.

Take Apart Keyboard Components - 24

Keyboard Components

Before you begin, remove
the following:

• Rear cover

Trackball/Keypad

Keyboard

• Main battery

• Keyboard cover

Caution:

precautions in Bulletins/
Safety.

Review the ESD

Take Apart Keyboard Components - 25

Caution:

replace the battery cover
after removing the main
battery. Failure to
reinstall the cover leaves
power connected to the logic
board. Removing and
replacing modules with
power available could
damage any modules.

Remember to

Take Apart Keyboard Components - 26

Note:

The take apart

procedure is the same for

Input Device Cable

the keyboard, trackball, and
numeric keypad.

1 Disconnect the flat cable

from the device you want
to remove.

• Keyboard

• Trackball

• Numeric keypad

Take Apart Keyboard Components - 27

2 Starting at one side of

the device, pull or pry
up the frame of the
device while releasing
each plastic retainer
clip.

3 After you release all the

clips, lift the back end of
the device up and out of
the computer.

Take Apart Speaker - 28

Speaker

Before you begin, remove
the following:

• Rear cover

• Main battery

• Keyboard cover

Speaker

Caution:

precautions in Bulletins/
Safety.

Review the ESD

Take Apart Speaker - 29

Caution:

replace the battery cover
after removing the main
battery. Failure to
reinstall the cover leaves
power connected to the logic
board. Removing and
replacing modules with
power available could
damage any modules.

Remember to

Take Apart Speaker - 30

1 Disconnect the speaker

Speaker

cable from connector
J16 on the logic board.

2 Push out the two latches

and remove the speaker
from the subframe.

Take Apart Display Assembly - 31

Display Assembly

Before you begin, remove

Display Assembly

the following:

• Rear cover

• Main battery

• Keyboard cover

Caution:

precautions in Bulletins/
Safety.

Review the ESD

Take Apart Display Assembly - 32

Caution:

replace the battery cover
after removing the main
battery. Failure to
reinstall the cover leaves
power connected to the logic
board. Removing and
replacing modules with
power available could
damage any modules.

Remember to

Take Apart Display Assembly - 33

1 Disconnect the display

cable from connector
J19 on the logic board.

Display Cable

Take Apart Display Assembly - 34

2 Twist the left clutch

cover back and forth and

Left Clutch
Retainer

pull it away from the
display.

3 Lift and remove the left

clutch retainer.

Left Clutch
Cover

Take Apart Display Assembly - 35

4 Pull the display with

your right hand while
maintaining slight
outward pressure on the
computer with your left

Left Clutch
Mechanism

hand. This movement
pulls off the left clutch
mechanism (1).

5 Disengage and remove

the display assembly
from the right clutch
mechanism (2).

Take Apart LCD Display (Nonbacklit) - 36

LCD Display (Nonbacklit)

Before you begin, remove
the following:

LCD Display
(nonbacklit)

• Rear cover

• Main battery

• Keyboard cover

• Display assembly

Take Apart LCD Display (Nonbacklit) - 37

Caution:

extremely susceptible to
ESD damage. Review the ESD
precautions in Bulletins/
Safety. Handle the display
by the edges and do not touch
the component side or
remove the tape.

The LCD display is

Take Apart LCD Display (Nonbacklit) - 38

Caution:

replace the battery cover
after removing the main
battery. Failure to
reinstall the cover leaves
power connected to the logic
board. Removing and
replacing modules with
power available could
damage any modules.

Remember to

Take Apart LCD Display (Nonbacklit) - 39

Mounting Screw Mounting Screw

Display Bezel

Carrying Handle

Center Pivot Cover

1 Slide the carrying handle

from the display to its
fully extended position.

Note:

Later model Portables
and replacement displays
have two Phillips screws
securing the bezel to the
housing.

2 Remove the two bezel

mounting screws, if
present.

Take Apart LCD Display (Nonbacklit) - 40

3 Turn the opening of the

center pivot cover
toward the display. Pull
the cover from the
display housing.

Center Pivot Cover

Take Apart LCD Display (Nonbacklit) - 41

4 Insert a jeweler’s

screwdriver into the
display latch opening on
the right side of the
display housing. Push
the screwdriver into the
opening until you hear a
click.

5 Pull the display bezel

toward you with your
fingers while you push
the display housing with

Display Latch Opening

your thumb. The two
parts separate about 1/8
inch.

6 Repeat for the left side.

Take Apart LCD Display (Nonbacklit) - 42

Display Bezel

7 Lift the display bezel and

the carrying handle off
the display housing.

Carrying Handle

Take Apart LCD Display (Nonbacklit) - 43

8 Disconnect the display

cable.

9 Pull out the two display

mounting clips with
your thumbs and lift the

Display
Mounting
Clip

Display
Cable

Display Assembly

Display
Mounting
Clip

display with your index
fingers.

10 Slide the display up and

out of the housing.

Take Apart LCD Display (Backlit) - 44

LCD Display (Backlit)

Before you begin, remove
the following:

LCD Display
(backlit)

• Rear cover

• Main battery

• Keyboard cover

• Display assembly

Take Apart LCD Display (Backlit) - 45

Caution:

extremely susceptible to
ESD damage. Review the ESD
precautions in Bulletins/
Safety. Handle the display by
the edges and do not touch the
component side or remove
the tape.

The LCD display is

Take Apart LCD Display (Backlit) - 46

Caution: Remember to
replace the battery cover
after removing the main
battery. Failure to
reinstall the cover leaves
power connected to the logic
board. Removing and
replacing modules with
power available could
damage any modules.

Take Apart LCD Display (Backlit) - 47

Carrying Handle

Mounting Screw

Display Bezel Center Pivot Cover

Mounting Screw

1 Slide the carrying handle

from the display to its
fully extended position.

Note: Later model Portables
and replacement displays
have two Phillips screws
securing the bezel to the
housing.

2 Remove the two bezel

mounting screws, if
present.

Take Apart LCD Display (Backlit) - 48

3 Turn the opening of the

center pivot cover
toward the display. Pull
the cover from the
display housing.

Center Pivot Cover

Take Apart LCD Display (Backlit) - 49

4 Insert a jeweler’s

screwdriver into the
display latch opening on
the right side of the
display housing. Push
the screwdriver into the
opening until you hear a
click.

5 Pull the display bezel

toward you with your
fingers while you push
the display housing with

Display Latch Opening

your thumb. The two
parts separate about 1/8
inch.

6 Repeat for the left side.

Take Apart LCD Display (Backlit) - 50

Display Bezel

7 Lift the display bezel and

the carrying handle off
the display housing.

Carrying Handle

Take Apart LCD Display (Backlit) - 51

8 Press the tab and

disconnect the CCFL-to­inverter cable.

Inverter Board-to-LCD

Display Cable

Inverter Board

CCFL-to-Inverter

Cable

9 Slide out the release

latch and remove the
cable that connects the
inverter board to the
LCD display.

10 Note: Skip this step if

you are replacing only
the display.

Using a jeweler’s
screwdriver, gently pry
the inverter board from
the display housing.

Take Apart LCD Display (Backlit) - 52

11 Pull out the two display

mounting clips with
your thumbs and lift the
display with your index
fingers.

12 Slide the display up and

out of the housing.

Display
Mounting
Clip

Display Assembly

Display
Mounting
Clip

Take Apart LCD Display (Backlit) - 53

13 Turn over the display

assembly.

14 Slide out the release

latch and remove the
display cable from the
connector.

Connector

Display Assembly

(Upside Down)

Latch

Display Cable

Take Apart Logic Board - 54

Logic Board

Before you begin, remove
the following:

• Rear cover

• Main battery

• Keyboard cover

• Display assembly

• Keyboard

• Trackball/numeric

keypad

• All option cards

Caution: Review the ESD

Logic Board

precautions in Bulletins/
Safety.

Take Apart Logic Board - 55

Caution: Remember to
replace the battery cover
after removing the main
battery. Failure to
reinstall the cover leaves
power connected to the logic
board. Removing and
replacing modules with
power available could
damage any modules.

Take Apart Logic Board - 56

1 Disconnect the following

Outline of Logic Board

cable connectors from
the logic board:

• Input device cable
from J13

• Input device cable
from J20

• Battery cable from
J17

• Hard drive cable from
J18

• Lower floppy drive
cable from J14

• Upper floppy drive
cable from J15

• Speaker cable from
J16

Take Apart Logic Board - 57

Caution: Do not lift the
subframe too far. Lifting too
far puts excess strain on the
subframe and logic board and
could damage both.

2 Using a flat-blade

screwdriver, pull the
latch from the subframe.
When the latch is clear,
lift the left side of the

Left Subframe Latch

frame.

Take Apart Logic Board - 58

Right
Subframe
Latch

3 Hold the left side of the

subframe up—far enough
to keep it from being
held by the clip—and
press in the clip at the
right front of the
subframe. Lift the
subframe a little
further.

4 Using a flat-blade

screwdriver, release the
plastic latch at the right
side of the subframe.

Take Apart Logic Board - 59

Subframe

(Upside Down)

5 To remove the subframe

from the bottom case,
lift the front of the
subframe and pull it
toward you.

6 Place the subframe

upside down.

Take Apart Logic Board - 60

7 Release each of the

plastic clips that secure
the logic board to the
subframe. Release the
clips in the order shown.

Logic Board

As you release each clip,
gently lift the logic
board and proceed to the
next clip.

8 Remove the logic board

from the subframe.

Typical Securing Clip

K

Service Source

Upgrades

Macintosh Portable

Upgrades Hard Drive Installation - 1

Hard Drive Installation

Before you begin, do the
following:

• Disconnect the power
adapter

• Remove the rear cover

• Remove the main battery

• Remove the keyboard
cover

• Remove any option cards

Hard Drive

Caution:

precautions in Bulletins/
Safety.

Review the ESD