Apple powerbook 150 Service Manual

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Service Source

PowerBook 150

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Service Source

Basics

PowerBook 150

Basics General Information - 1

General Information

The PowerBook 150, shown at left, is an all-in-one
notebook computer that features a 68030 processor
running at 33 MHz and a 9.5 inch diagonal backlit FSTN
display. The PowerBook 150 includes a 120 MB internal
hard drive and supports up to six external SCSI devices
through a SCSI port.

The PowerBook 150 internal hard drive is based on IDE
(Intelligent Device Electronics) technology, commonly used

Figure: PowerBook 150

in DOS-compatible systems. The IDE drive functions the
same as a typical SCSI hard drive; it does not affect SCSI ID
selections or SCSI termination schemes.

Basics Rear Panel - 2

Rear Panel

Power

Adapter

Modem SCSI

(HDI-30)

Printer/Modem Reset

Button

Power
Button

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Service Source

Specifications

PowerBook 150

Specifications Introduction - 1

Introduction

You can also find specifications information for this product in the

Spec Database, which you can access in one of three ways:

Ñ Launch it directly by double-clicking the Apple Spec Database

runtime alias at the top level of the Main Service Source CD.

Ñ Select "Apple Spec Database" from the Service Source drop-

down main menu.

Ñ Click the Acrobat toolbar icon for the database, which is near

the right end of the toolbar with the letters "SP."

Specifications Processor - 2

Processor

CPU

Addressing

Motorola 68030 microprocessor
33 MHz

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

Specifications Memory - 3

Memory

RAM

ROM

PRAM

VRAM

Clock/Calendar

4 MB, expandable to 40 MB

1 MB

256 bytes of parameter memory

256K of static video display memory

CMOS custom chip

Specifications Disk Storage - 4

Disk Storage

Floppy Drive

Hard Drive

19 mm high, 1.4 MB Apple SuperDrive

2.5 in., 120 MB IDE hard drive

Specifications I/O Interfaces - 5

I/O Interfaces

SCSI

Serial

HDI-30 SCSI port with 1.5 MB/sec. transfer rate
Supports up to six external SCSI devices
Connect SCSI device to computer with HDI-30 SCSI system cable

One RS-422 serial port; mini DIN-8 connector

Specifications I/O Devices - 6

I/O Devices

Keyboard

Trackball

Built-in standard Apple keyboard
63 keys domestic; 64 keys ISO
18 mm vertical pitch; 18.63 mm horizontal pitch
Two-level tilt adjustment

30 mm diameter, dual button
Apple Desktop Bus (ADB) interface

Specifications Sound and Video - 7

Sound and Video

Video Display

Sound Generator

9.5 in. diagonal screen
Flat-panel, film-compensated supertwist nematic (FSTN) liquid

crystal display

640 lines by 480 pixels

Apple sound chip provides 8-bit sound capable of driving stereo
headphones or other stereo equipment through the sound jack

Specifications Electrical - 8

Electrical

Main Battery

Power Adapter

Nickel cadmium (NiCad) battery
Provides 2Ð4 hours of usage before recharging

110Ð240 VAC line voltage
50Ð60 Hz
US, Japanese, United Kingdom, Australian, and European versions

Specifications Physical - 9

Physical

Dimensions

Weight

Height: 2.3 in. (5.8 cm)
Width: 11.3 in. (28.7 cm)
Depth: 9.3 in. (23.6 cm)

5.5 lb. (2.5 kg) with battery

Specifications Environmental - 10

Environmental

Operating
Temperature

Storage
Temperature

Relative Humidity

Operating Altitude

Shipping Altitude

50Ð95¡ F (10Ð35¡ C)

14Ð140¡ F (-10 to 60¡ C)

20Ð80% noncondensing

0Ð10,000 ft. (0Ð3048 m)

0Ð15,000 ft. (0Ð4722 m)

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Service Source

Troubleshooting

PowerBook 150

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 Power Manager Reset/ - 2

Power Manager Reset

Reset the power manager if

• The battery and power adapter are proven good, but the
computer will not power on.

• The computer will not reset after a system crash.

To reset the power manager in a PowerBook 150,

• Remove the AC adapter and the battery.

• Using a paper clip, hold down the reset button on the back of the
computer for 5–10 seconds.

• Reconnect the AC adapter and briefly push the reset button
again. You should hear a small pop from the speaker.

• Turn on the computer.

• If the computer powers on, reinstall the battery. If the
computer does not start, it may need servicing.

Troubleshooting Symptom Charts/Startup - 3

Symptom Charts

Startup

RAM failure occurs
(eight-tone error
chord sequence
sounds after startup
chord)

Hardware failure
occurs (four-tone
error chord sequence
sounds after startup
chord)

1 Replace RAM expansion card.
2 Replace logic board.

1 Disconnect hard drive data cable and reboot system. If

startup sequence is normal, replace hard drive.

2 Disconnect floppy drive cable and reboot system. If startup

sequence is normal, replace floppy drive.

3 Replace logic board.

Troubleshooting Symptom Charts/Startup

(Continued)

- 4

Screen displays
checkerboard pattern;
no startup chime

Startup

1 Reseat RAM expansion card.
2 Replace RAM expansion card.
3 Reseat display cable.

(Continued)

Troubleshooting Symptom Charts/Power - 5

Power

Screen is blank;
computer doesn’t
respond

After removing main
battery, some
Control Panel
settings are different

1 Press reset switch.
2 Connect power adapter and reboot computer in 3–4 minutes.
3 Try known–good, charged main battery.
4 Check all interconnect board and logic board connections.
5 Reset the power manager.
6 Replace keyboard.
7 Replace interconnect board.
8 Replace logic board.

1 Replace interconnect board.
2 Replace logic board.

Troubleshooting Symptom Charts/Power

(Continued)

- 6

Power adapter is
plugged in, but
battery DA does not
indicate charger is
connected

Low-power warning
appears

Power

1 Check battery charger connection.
2 Try known-good, charged main battery.
3 Try known-good power adapter.
4 Replace logic board.

1 Recharge battery or attach power adapter.
2 Verify that peripherals are low-power.
3 Reduce use of power-consuming devices or connect power

4 Try known-good, charged main battery.
5 Try known-good power adapter.
6 Replace logic board.

(Continued)

adapter.

Troubleshooting Symptom Charts/Power

(Continued)

- 7

Computer runs when
plugged in to wall
outlet but not on
battery power;
battery voltage is
within tolerance

Power

1 Reseat battery to make sure battery is mating with contacts

2 Replace fuse on logic board.
3 Replace logic board.
4 Return computer to Apple.

(Continued)

on logic board.

Troubleshooting Symptom Charts/Video - 8

Video

Row or partial row of
pixels never comes
on or is always on

Thin white line is
always on at middle of
screen

1 Replace display cable.
2 Replace display.
3 Replace interconnect board.

Thin white line is normal for FSTN screens.

Troubleshooting Symptom Charts/Video

(Continued)

- 9

Display is very light
or totally white

Video

1 Adjust screen contrast.
2 Adjust screen brightness.
3 Check display cable, inverter board, interconnect board, and

4 Replace inverter board.
5 Replace interconnect board.
6 Replace display cable.
7 Replace display.
8 Replace logic board.

(Continued)

logic board connections.

Troubleshooting Symptom Charts/Video

(Continued)

- 10

No display, but
computer appears to
operate correctly

Rainbow colors
visible from extreme
viewing angles

Video

1 Adjust screen contrast.
2 Check display cable, inverter board, interconnect board, and

3 Replace inverter board.
4 Replace interconnect board.
5 Replace power cable.
6 Replace display cable.
7 Replace display.
8 Replace logic board.

Such colors are normal for FSTN screens.

(Continued)

logic board connections.

Troubleshooting Symptom Charts/Video

(Continued)

- 11

Video

Image is not uniform Irregularity in images is normal for FSTN screens. Adjust

contrast and brightness to diminish effect.

Display stopped
working or dimmed
but is fine now

Backlight doesn’t
operate

If temperature is under 5 or over 40 degrees centigrade, this
reaction is normal for FSTN screens.

1 Check cables.
2 Check display cable, inverter board, interconnect board, and

3 Replace inverter board.
4 Replace inverter cable.
5 Replace interconnect board.
6 Replace display.
7 Replace logic board.

(Continued)

logic board connections.

Troubleshooting Symptom Charts/Video

(Continued)

- 12

Video

Screen goes blank 1 Press any key to wake computer from system sleep.

2 Check display cable connection.

Pixel is always white
or always black

Replace display.

(Continued)

Troubleshooting Symptom Charts/Floppy Drive - 13

Floppy Drive

Audio and video
present, but internal
drive does not operate

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

1 Try known-good floppy disk.
2 Check floppy drive cable connection.
3 Replace floppy drive cable.
4 Replace floppy drive.
5 Replace logic board.

1 Try known-good system disk.
2 Verify that trackball or mouse button is not stuck.
3 Check floppy drive cable connection.
4 Replace floppy drive cable.
5 Replace floppy drive.
6 Replace logic board.

Troubleshooting Symptom Charts/Floppy Drive

(Continued)

- 14

Floppy Drive

Disk does not eject 1 Switch off system and hold mouse button down while you

switch system on.
2 Insert opened paper clip into hole beside drive.
3 Check floppy drive cable connection.
4 Replace floppy drive cable.
5 Replace floppy drive.
6 Replace logic board.

Disk initialization
fails

1 Try known-good floppy disk.
2 Install inverter shield.
3 Check floppy drive cable connection.
4 Replace floppy drive cable.
5 Replace floppy drive.

(Continued)

Troubleshooting Symptom Charts/Floppy Drive

(Continued)

- 15

Read/write/copy
error

Floppy Drive

1 Try known-good floppy disk.
2 Install inverter shield.
3 Check floppy drive cable connection.
4 Replace floppy drive cable.
5 Replace floppy drive.

(Continued)

Troubleshooting Symptom Charts/Hard Drive - 16

Hard Drive

Internal hard drive
does not operate

1 Make sure power adapter is connected.
2 Check hard drive cable connection.
3 Replace hard drive cable.
4 Replace hard drive.
5 Replace logic board.

Troubleshooting Symptom Charts/Peripherals - 17

Peripherals

After connecting
external SCSI device,
computer doesn’t boot

Cursor does not move
when using trackball

1 Switch on external SCSI device before starting computer.
2 Check cable connections.
3 Verify that standard Apple terminator terminates end of SCSI

chain.
4 Verify that SCSI select switch setting on external device is

unique.
5 Verify operation of internal hard drive.
6 Try known-good external SCSI device.
7 Replace logic board.

1 Press reset switch.
2 Check interconnect board and logic board connections.
3 Replace interconnect board.
4 Replace logic board.

Troubleshooting Symptom Charts/Peripherals

(Continued)

- 18

Cursor intermittently
does not move or
moves erratically

Cursor moves, but
clicking trackball
button has no effect

Peripherals

1 Clean ball and rollers of trackball.
2 Replace trackball.
3 Replace keyboard.
4 Replace interconnect board.
5 Replace logic board.

1 Check interconnect board and logic board connections.
2 Replace trackball.
3 Replace keyboard.
4 Replace interconnect board.
5 Replace logic board.

(Continued)

Troubleshooting Symptom Charts/Peripherals

(Continued)

- 19

No response to any
key on keyboard

Known-good
ImageWriter,
ImageWriter II, or
LQ does not print

Peripherals

1 Reset power manager.
2 Check connections of keyboard to interconnect board.
3 Replace keyboard.
4 Replace interconnect board.
5 Replace logic board.

1 Verify that System is current.
2 Verify that Chooser and Control Panel settings are correct.
3 Check cables.
4 Replace printer interface cable.
5 Try known-good printer.
6 Replace logic board.

(Continued)

Troubleshooting Symptom Charts/Peripherals

(Continued)

- 20

Known-good
LaserWriter does not
print

Device connected to
external modem port
doesn’t work

Peripherals

1 Verify that System is current.
2 Verify that Chooser and Control Panel settings are correct.
3 Check cables.
4 Replace printer interface cable.
5 Try known-good printer. If printer works, troubleshoot

network. Refer to Networking and Communications manual.
6 Replace logic board.

1 Verify that External Modem is selected in CDEV.
2 Verify that System is current.
3 Verify third-party setup software.
4 Check cables.
5 Attach device to known-good computer.
6 Replace logic board.

(Continued)

Troubleshooting Symptom Charts/Peripherals

(Continued)

- 21

I/O devices are
unrecognized or
garbage is
transmitted or
received

Peripherals

1 Verify that System is current.
2 Check cables.
3 Verify that SCSI device has standard Apple terminator.
4 Verify that SCSI select switch setting on external device is

unique.
5 Attach device to known-good computer.
6 Replace logic board.

(Continued)

Troubleshooting Symptom Charts/Internal Modem - 22

Internal Modem

Internal modem
options do not appear
in CDEV

Modem does not
respond properly to
AT command set
instructions

1 Remove and reseat modem card.
2 Verify that System is current.
3 Replace modem card.
4 Replace logic board.

1 Verify that baud rate and data format settings of

communications application are compatible with internal

modem and remote modem.
2 Check phone cord connection and operation.
3 Remove and reseat modem card.
4 Verify that System is current.
5 Replace modem card.

Troubleshooting Symptom Charts/Internal Modem

(Continued)

- 23

Strange mix of
characters appears
on screen

Modem interferes
with system sound

Internal Modem

1 Verify that baud rate and data format settings of

communications application are compatible with internal

modem and remote modem.
2 Check phone cord connection and operation.
3 Remove and reseat modem card.
4 Verify that System is current.
5 Replace modem card.
6 Replace logic board.

1 Remove and reseat modem card.
2 Replace modem card.
3 Replace interconnect board.
4 Replace logic board.

(Continued)

Troubleshooting Symptom Charts/Internal Modem

(Continued)

- 24

Modem does not
respond to incoming
call

Modem has no sound
output

Modem connects but
does not communicate
with remote modem

Internal Modem

1 If computer is in sleep mode, verify that Wake On Ring

option in CDEV is selected.
2 Check phone cord connection and operation.
3 Replace modem card.
4 Replace logic board.

1 Verify that Control Panel volume setting is above 0.
2 Replace modem card.
3 Replace interconnect board.
4 Replace logic board.

1 Verify that remote modem needs error correction (error

correction is internal modem default).
2 If remote modem does not need error correction, type AT

&Q0 to disable error correction.

(Continued)

Troubleshooting Symptom Charts/Miscellaneous - 25

Miscellaneous

Screen goes blank and
computer shuts down
every few minutes

Application seems to
run slower after few
seconds

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

Adjust sleep delays in Control Panel or connect power adapter.

Connect power adapter.

Adjust sleep delays in Control Panel or connect power adapter.

Troubleshooting Symptom Charts/Miscellaneous

(Continued)

- 26

No sound from
speaker

Miscellaneous

1 Verify that volume setting in Control Panel is 1 or above.
2 Check connection of interconnect board to logic board.
3 Replace interconnect board.
4 Replace logic board.

(Continued)

K

Service Source

T ak e Apart

PowerBook 150

Take Apart Main Battery - 1

Main Battery

Before you begin,
disconnect the power
adapter.

Note:

This procedure also
covers removal of the main
battery door.

Main Battery

Important:

the main battery, use the
Macintosh Shut Down
command. Otherwise, all
RAM contents will be lost.

±

Warning:

battery is a NiCad battery
that contains toxic

Before removing

The main

Take Apart Main Battery - 2

materials. Review battery
handling and disposal
instructions in Bulletins/
Safety.

1 Slide open the battery

door.

2 Using the battery door as

a handle, pull out the
main battery.

Take Apart Main Battery - 3

Note:

Complete the next
steps only if you are
replacing the battery or
battery door.

3 Slide the battery door

completely open.

End Tab

4 Pull the end tab until it

releases, and remove
the door from the
battery.

Take Apart Top Case - 4

Top Case

Before you begin, remove
the main battery.

Top Case

Caution:

150 contains CMOS devices
that are very susceptible to
ESD damage. Review the ESD
precautions in Bulletins/
Safety.

The PowerBook

Take Apart Top Case - 5

1 Using a T-8 torx driver,

remove the five torx
screws from the bottom
case.

Take Apart Top Case - 6

2 Lift up the top case and

disconnect the
interconnect cable.

Tab Fastener

Interconnect
Cable

3 Lift off the top case and

unhook the two tab
fasteners from the front
of the bottom case.

Replacement Caution:

When
connecting the interconnect
cable, fold the cable as
shown. If it is not folded
correctly, the cable could
short.

Take Apart Hard Drive - 7

Hard Drive

Before you begin, remove
the following:

• Main battery

• Top case

Hard Drive

Caution:

150 contains CMOS devices
that are very susceptible to
ESD damage. Review the ESD
precautions in Bulletins/
Safety.

The PowerBook

Take Apart Hard Drive - 8

Caution:

cable is fragile. Handle it
with care.

1 Disconnect the hard

The hard drive

drive cable from the
logic board.

Take Apart Hard Drive - 9

2 Carefully fold back the

hard drive cable.

3 Using a T-8 torx driver,

remove the three hard
drive mounting screws.

4 Lift the hard drive out of

the bottom case.

Hard Drive

Cable

Take Apart Hard Drive - 10

Note:

Complete the
following steps if you are
replacing the hard drive,
hard drive cable, or hard
drive bracket.

5 Using a small flat-blade

screwdriver, carefully
pry the hard drive cable
from the hard drive.

Take Apart Hard Drive - 11

6 Turn over the hard

drive.

7 Using a #1 Phillips

screwdriver, remove
the four screws securing
the hard drive bracket.

8 Remove the bracket from

the hard drive.

Replacement Note:

information on returning
drives, cables, and carriers
to Apple, refer to the Hard
Drives manual.

For

Take Apart Floppy Drive - 12

Floppy Drive

Before you begin, remove
the following:

• Main battery

• Top case

• Modem card (if present)

Floppy Drive

Caution:

150 contains CMOS devices
that are very susceptible to
ESD damage. Review the ESD
precautions in Bulletins/
Safety.

The PowerBook

Take Apart Floppy Drive - 13

Floppy Drive

Hard Drive

Cable

Caution:

The hard drive
cable is fragile and should be
handled with care.

1 Disconnect the hard

drive cable from the
logic board.

2 Carefully fold back the

cable from the floppy
drive.

Take Apart Floppy Drive - 14

Locking
Tab

Caution:

The floppy drive
cable is fragile and should be
handled with care.

3 Lift the locking tab on

the floppy drive
connector and disconnect
the floppy drive cable
from the logic board.

Take Apart Floppy Drive - 15

4 Using a T-8 torx driver,

remove the four floppy
drive mounting screws.

5 Lift the floppy drive out

of the bottom case.

Take Apart Floppy Drive - 16

Note:

Complete the
following steps if you are
replacing the floppy drive,
floppy drive cable, or floppy
drive brackets.

6 Using a small flat-blade

screwdriver, push out
the locking tab and
remove the floppy drive
cable from the drive.

Take Apart Floppy Drive - 17

7 Using a #0 Phillips

screwdriver, remove
the four screws securing
the left and right floppy
drive brackets.

8 Remove the brackets

from the floppy drive.

Take Apart Trackball Assembly - 18

Trackball Assembly

Before you begin, remove
the following:

• Main battery

Trackball
Assembly

• Top case

Caution:

150 contains CMOS devices
that are very susceptible to
ESD damage. Review the ESD
precautions in Bulletins/
Safety.

The PowerBook

Take Apart Trackball Assembly - 19

Trackball

Cable

Locking

Tab

Caution:

The trackball cable
is fragile and should be
handled with care.

1 Pull out the locking tab

on the trackball
connector and disconnect
the trackball cable.

Take Apart Trackball Assembly - 20

2 Using a T-8 torx driver,

remove the two mounting
screws and lift the
trackball assembly out
of the top case.

Take Apart Keyboard - 21

Keyboard

Before you begin, remove
the following:

• Main battery

• Top case

Keyboard

• Trackball assembly

Caution:

150 contains CMOS devices
that are very susceptible to
ESD damage. Review the ESD
precautions in Bulletins/
Safety.

The PowerBook

Take Apart Keyboard - 22

Keyboard
Cables

Caution:

The keyboard
ribbon cables are fragile and
should be handled with care.

1 Lift up the locking tabs

on the two keyboard
connectors and
disconnect the keyboard
cables.

Take Apart Keyboard - 23

2 Using a T-8 torx driver,

remove the seven
mounting screws and
lift the keyboard out of
the top case.

Take Apart Inverter Board - 24

Inverter Board

Before you begin, remove
the following:

• Main battery

• Top case

Inverter Board

Caution:

150 contains CMOS devices
that are very susceptible to
ESD damage. Review the ESD
precautions in Bulletins/
Safety.

The PowerBook

Take Apart Inverter Board - 25

1 Remove the two

mounting screws that
secure the inverter

Inverter

Shield

Inverter
Cable

Inverter

Board

board to the bottom case.

2

Note:

Do not remove the
inverter shield from the
inverter board.

Pull the inverter board
and attached shield
straight up and off the
connector on the
interconnect board.

3 Disconnect the inverter

cable.

Replacement Note:

Inverter

shields are available from

Take Apart Inverter Board - 26

Contrast PotBrightness Pot

Actuator Actuator

Inverter
Board

the Service Price Pages. If
you are replacing a defective
inverter that has an
inverter shield installed,
order both the inverter
board and the inverter
shield. Do not reuse the
original inverter shield.

Replacement Note:

Be sure
to align the brightness and
contrast pots on the inverter
board with the plastic
actuators on the top case. It
is easiest to align the pots
and actuators if you set both
to their extreme outer
positions.

Take Apart Interconnect Board - 27

Interconnect Board

Before you begin, remove
the following:

• Main battery

• Top case

• Inverter board

Interconnect Board

Caution:

150 contains CMOS devices
that are very susceptible to
ESD damage. Review the ESD
precautions in Bulletins/
Safety.

The PowerBook

Take Apart Interconnect Board - 28

±

Warning:

interconnect board contains
hazardous materials.
Return bad interconnect
boards to Apple for proper
disposal.

1

Caution:

and display ribbon
cables are fragile.
Handle these cables with
care.

Lift up the locking tabs
on the two keyboard
connectors and
disconnect the keyboard
cables.

The

The keyboard

Take Apart Interconnect Board - 29

2

Note:

The display cable
will not come entirely
out of the connector until
you remove the
interconnect board from
the top case.

Pull out the locking tab
on connector J2 and ease
the display cable out of
the connector as far as
the cable will go.

J2 Connector

Replacement Note:

Connect
the display cable before
replacing the interconnect
board.

Take Apart Interconnect Board - 30

3 Using a T-8 torx driver,

remove the two mounting
screws and lift the
interconnect board from
the top case.

Take Apart Actuators - 31

Actuators

Before you begin, remove
the following:

• Main battery

• Top case

• Inverter board

Actuators

Caution:

150 contains CMOS devices
that are very susceptible to
ESD damage. Review the ESD
precautions in Bulletins/
Safety.

The PowerBook

Take Apart Actuators - 32

1 Pull up the contrast

actuator, rotate it
toward the display, and
remove the actuator
from the top case.

2 Repeat for the

brightness actuator.

Take Apart Elevation Feet - 33

Elevation Feet

Before you begin, remove
the following:

• Main battery

• Top case

Elevation Foot

Elevation Foot

Caution:

150 contains CMOS devices
that are very susceptible to
ESD damage. Review the ESD
precautions in Bulletins/
Safety.

The PowerBook

Take Apart Elevation Feet - 34

1 Using a T-8 torx driver,

remove the torx screw
and washer and the
spring clip from the
inside of the elevation
foot.

2 Pull off the elevation

Spring
Clip

Elevation
Foot

foot.

Take Apart Fuse - 35

Fuse

Before you begin, remove
the following:

• Main battery

• Top case

Fuse

Caution:

150 contains CMOS devices
that are very susceptible to
ESD damage. Review the ESD
precautions in Bulletins/
Safety.

The PowerBook

Take Apart Fuse - 36

1 Using a small flat-blade

screwdriver, pry up
and remove the fuse.

Take Apart Logic Board - 37

Logic Board

Before you begin, remove
the following:

• Main battery

• Top case

• RAM expansion card (if

present)

• Modem board (if present)

Logic Board

Caution:

150 contains CMOS devices
that are very susceptible to
ESD damage. Review the ESD
precautions in Bulletins/
Safety.

The PowerBook

Take Apart Logic Board - 38

Hard Drive

Cable

Floppy
Drive
Cable

Caution:

The hard drive and
floppy drive cables are
fragile. Handle them with
care.

1 Disconnect the hard

drive cable from the
logic board.

2 Lift up the locking tabs

and disconnect the floppy
drive cable from the
logic board.

Take Apart Logic Board - 39

Torx
Screw

Tall
Hex
Nut

Hex Nut Screw

Logic Board

3 Remove the three hex

nut screws and three
torx screws that secure
the logic board to the
bottom case.

4 Lift the logic board out of

the bottom case.

Replacement Note:

Replace
the tall hex nut screw in the
corner of the logic board
nearest the RAM card
connector.

Take Apart Display Bezel - 40

Display Bezel

Display Bezel

Before you begin, remove
the main battery.

Caution: The PowerBook
150 contains CMOS devices
that are very susceptible to
ESD damage. Review the ESD
precautions in Bulletins/
Safety.

Take Apart Display Bezel - 41

1 Remove the two plastic

plugs.

Plastic Plugs

Screw

Plastic
Plug

2 Using a T-8 torx driver,

remove the two bezel
mounting screws from
the display.

Take Apart Display Bezel - 42

3 Pull the display bezel

down and away from the
display and release the
bezel from the mounting
tabs at the top and sides

Display Bezel

of the display.

4 Lift the bezel off the

display.

Take Apart Clutches/Display Housing - 43

Clutches/Display Housing

Before you begin, remove
the following:

• Main battery

• Display bezel

Clutch Assembly

Caution: The PowerBook
150 contains CMOS devices
that are very susceptible to
ESD damage. Review the ESD
precautions in Bulletins/
Safety.

Take Apart Clutches/Display Housing - 44

Display Housing

EMI Shield

Display

1 Cover the keyboard with

a clean cloth or sheet of
paper.

2 Using a T-8 torx driver,

remove the four display
mounting screws.

3 Remove the display

from the housing and
EMI shield.

4 Place the display face-

down on the keyboard.

Take Apart Clutches/Display Housing - 45

5 Pull off the three clutch

Inverter

Cable

covers.

6 Using a T-8 torx driver,

remove the three

Clutch Covers

mounting screws from
the left and right
clutches.

7 Remove the left and right

Right

Clutch

clutches from the
display housing.

Replacement Note: Replace
the short mounting screws
in the top-inside clutch
threadings. The top-outside
threadings are used to mount
the bezel.

Take Apart Clutches/Display Housing - 46

Display Housing

EMI Shield

Replacement Note: To avoid
pinching the inverter cable,
make sure it routes as
illustrated.

8 Remove the display

housing and EMI shield
from the case.

Take Apart Display - 47

Display

Display

Before you begin, remove
the following:

• Main battery

• Display bezel

Caution: The PowerBook
150 contains CMOS devices
that are very susceptible to
ESD damage. Review the ESD
precautions in Bulletins/
Safety.

Take Apart Display - 48

Display Housing

EMI Shield

Display

Caution: The display cable
is fragile and should be
handled with care.

1 Cover the keyboard with

a clean cloth or sheet of
paper.

2 Using a T-8 torx driver,

remove the four display
mounting screws.

3 Remove the display

from the housing and
EMI shield.

4 Place the display face-

down on the keyboard.

Take Apart Display - 49

5 Using a small flat-blade

Locking

Tab

screwdriver, pry up
and disconnect the
display cable.

Take Apart Display - 50

Inverter Cable

Inverter

Cable

Right

Clutch

6 Disconnect the inverter

cable from the display
backlight cable.

7 Remove the display.

Replacement Note: To avoid
pinching the inverter cable,
make sure it routes as
illustrated.

Backlight
Cable

Take Apart Display Cable - 51

Display Cable

Display Cable

Before you begin, remove
the following:

• Main battery

• Top case

• Inverter board

• Interconnect board

• Display bezel

• Display

Caution: The PowerBook
150 contains CMOS devices
that are very susceptible to
ESD damage. Review the ESD
precautions in Bulletins/
Safety.

Take Apart Display Cable - 52

Caution: The display cable
is fragile and should be
handled with care.

1 Pry the display cable

ferrite bead from the
case.

Ferrite Bead

Take Apart Display Cable - 53

2 Pull off the center and

left clutch covers.

Left
Clutch
Cover

Display

Cable

Center
Clutch
Cover

Left Clutch

3 Using a T-8 torx driver,

remove the three
mounting screws from
the left clutch.

4 Remove the clutch from

the display housing.

Replacement Note: Replace
the short mounting screw in
the top-inside clutch
threading. The top-outside
threading is used to mount
the bezel.

5 Remove the display cable

from the case.

Take Apart Inverter Cable - 54

Display Housing

Inverter Cable

Before you begin, remove
the following:

• Main battery

• Top case

• Inverter board

• Display bezel

Inverter Cable

Caution: The PowerBook
150 contains CMOS devices
that are very susceptible to
ESD damage. Review the ESD
precautions in Bulletins/
Safety.

Take Apart Inverter Cable - 55

1 Pull off the center and

Center
Clutch
Cover

Inverter

Cable

Right

Clutch

Cover

right clutch covers.

2 Using a T-8 torx driver,

remove the three
mounting screws from
the right clutch.

3 Remove the clutch from

the display housing.

Right

Clutch

Replacement Note: Replace
the short mounting screw in
the top-inside clutch
threading. The top-outside
threading is used to mount
the bezel.

Take Apart Inverter Cable - 56

Replacement Note: To avoid
pinching the inverter cable,

Backlight Cable

make sure it routes as
illustrated.

Inverter Cable

4 Fold back the right edge

of the display EMI shield
and disconnect the
inverter cable from the
backlight cable.

5 Remove the inverter

cable from the case.

K

Service Source

Upgrades

PowerBook 150