Apple PowerBook 140 Service Manual

K

Service Source

PowerBook 140/145/

145B/170

PowerBook 140, PowerBook 145,

PowerBook 145B, PowerBook 170

K

Service Source

Basics

PowerBook 140/145/145B/170

Basics Overview - 1

Overview

This manual includes
complete repair procedures
for the PowerBook 140,
PowerBook 145 and 145B,
and the PowerBook 170.

Figure: PowerBook 140, 145, 145B, 170

Basics Display Compatibility Matrix - 2

Display Compatibility Matrix

Active Matrix
PB 170
661-0711

Inverter 699-0273 699-0271 699-0272 922-0025

Display Cable 630-6273 922-0820 630-6272 922-0820

Inverter Cable 936-0106 936-0106 936-0106 936-0106

Important:

active matrix and three FSTN displays. Each of these
displays requires a compatible inverter and display cable;
the inverters, display cables, and displays are not
interchangeable. Before ordering a replacement display,
display cable, or inverter, refer to the display matrix.

FSTN, Rev. A
PB 140/145
661-0706

The PowerBook family includes four displays—an

FSTN, Rev. B
PB 140/145
661-0681

FSTN, Rev. C
PB 145/145B
661-0745

Basics Displays - 3

Displays

Each of the four displays
requires a compatible
inverter and display cable.
Refer to the following pages
to identify the displays.

Basics Displays - 4

Active-Matrix Display

The active-matrix display is
available for the PowerBook
170 only. Use the following
replacement parts with the
PowerBook 170:

• Active Matrix Display
661-0711

• Inverter (green)
699-0273

• Display Cable
630-6273

• Inverter Cable
936-0106

Basics Displays - 5

FSTN Display, Rev. A

Rev. A, B, and C FSTN
displays are available for
the PowerBook 140/145/
145B. The Rev. A display
has a plastic rear cover, and
the display cable connector
is located along the outside
edge of the printed circuit
board.

Basics Displays - 6

If you are replacing the
inverter, display cable, or
Rev. A display in a
PowerBook 140/145, use
these replacement parts:

• FSTN Display, Rev. A
661-0706

• Inverter (blue)
699-0271

• Display Cable
922-0820

• Inverter Cable
936-0106

Basics Displays - 7

FSTN Display, Rev. B

Rev. A, B, and C FSTN
displays are available for
the PowerBook 140/145/
145B. The printed circuit
board is exposed at the rear
of the Rev. B display, and the
display cable connector is
located near the center of the
board.

Basics Displays - 8

If you are replacing the
inverter, display cable, or
Rev. B display in a
PowerBook 140/145, use
these replacement parts:

• FSTN Display, Rev. B
661-0681

• Inverter (red)
699-0272

• Display Cable
630-6272

• Inverter Cable
936-0106

Basics Displays - 9

FSTN Display, Rev. C

Rev. A, B, and C FSTN
displays are available for
the PowerBook 140/145/
145B. The Rev. C display
has a plastic rear cover, and
the display cable connector
is located along the outside
edge of the printed circuit
board.

Basics Displays - 10

If you are replacing the
inverter, display cable, or
Rev. C display in a
PowerBook 145/145B, use
these replacement parts:

• FSTN Display, Rev. C
661-0745

• Inverter (blue)
922-0025

• Display Cable
922-0820

• Inverter Cable
936-0106

K

Service Source

Specifications

PowerBook 140/145/145B/170

Specifications Processor - 1

Processor

140 CPU

145/145B/170 CPU

Coprocessor (170 Only)

Addressing

Motorola 68030 microprocessor
16 MHz

Motorola 68030 microprocessor
25 MHz

Motorola 68882 floating-point unit (FPU)
25 MHz

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

Specifications Memory - 2

Memory

RAM

RAM 145B

ROM

PRAM

VRAM

4 MB, 2 MB installed on the daughterboard and 2 MB on an

expansion card

Expandable to 6 MB by replacing 2 MB expansion card with 4 MB

card

4 MB pseudostatic RAM (PSRAM) installed on the daughterboard
Expandable to 8 MB by installing 4 MB expansion card

1 MB, expandable to 4 MB

256 bytes of parameter memory

256K of static video display memory

Specifications Memory - 3

Clock/Calendar

Custom chip with long-life lithium battery

Specifications Disk Storage - 4

Disk Storage

Floppy Drive

Hard Drive

19 mm high, 1.4 MB Apple SuperDrive

2.5 in., 40/80/120 MB hard drive

Specifications I/O Interfaces - 5

I/O Interfaces

Floppy Drive

SCSI

Apple Desktop Bus

Serial

DB-19 serial port for connecting external floppy drives

HDI-30 SCSI port with 1.5 MB/sec. transfer rate
Supports up to five external SCSI devices
Does not provide termination power

Apple Desktop Bus (ADB) port (maximum of three ADB devices is
recommended)
200 mA maximum current draw for all ADB devices

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

Specifications I/O Interfaces - 6

Sound

Monaural sound-in port
Stereo sound-out headphone jack that plays CD audio tracks in

stereo and computer-generated sounds in mono

Specifications I/O Devices - 7

I/O Devices

Keyboard

Trackball

Microphone (140/ 145/170)

Built-in standard Apple keyboard
63 keys domestic; 64 keys ISO
Two-level tilt adjustment

30 mm diameter, dual button
ADB interface

Electret, omnidirectional
Output voltage of 4 mV, peak to peak

Specifications Sound and Video - 8

Sound and Video

Video Display 140/ 145/145B

Video Display 170

Sound Generator

10 in. (254 mm) diagonal screen
Flat-panel, film-compensated supertwist nematic (FSTN) liquid

crystal display
CCFL on-demand backlight
640 by 400 pixels

10 in. (254 mm) diagonal screen
Flat-panel, active-matrix liquid crystal display
CCFL on-demand backlight
640 by 400 pixels

Apple sound chip provides 8-bit sound capable of driving stereo

headphones or other stereo equipment through the sound jack

Specifications Electrical - 9

Electrical

Main Battery

PRAM Battery

Power Adapter

Nickel cadmium (NiCad), 2.5 Ah
Provides 2-3 hours of usage before recharging
Recharge time: 3 hours
500 power cycles capacity

3 V lithium

110–240 VAC line voltage
50–60 Hz
US, Japanese, United Kingdom, Australian, and European versions

Specifications Physical - 10

Physical

Dimensions

Weight

Height: 2.25 in. (5.7 cm)
Width: 11.25 in. (28.6 cm)
Depth: 9.3 in. (23.6 cm)

6.8 lb. (3.1 kg) with battery

Specifications Environmental - 11

Environmental

Operating Temperature

Storage Temperature

Relative Humidity

Altitude

50–104° F (10–40° C)

50–140° F (10–60° C)

20–80% noncondensing

0–15,000 ft. (0–4722 m)

Specifications Other - 12

Other

Fax/Data Modem

Internal 2400-baud modem with fax send at 9600 baud (includes

fax send software)
300/1200/2400 bps transmission rates
Serial binary and asynchronous protocols
Fax communication: V.29
Error correction: V.42 and MNP 4
Data compression: V.42bis and MNP 5

K

Service Source

Troubleshooting

PowerBook 140/145/145B/170

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 140/145/145B/
170,

• Remove the AC adapter and the battery.

• Let the unit sit without power hooked up for 3-5 minutes.

• Using two paper clips, simultaneously hold down the reset and

interrupt buttons for 5-10 seconds.

• Reinstall the battery and, if necessary, reconnect the AC

adapter.

• Turn on the computer.

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 daughterboard.
3 Replace motherboard.

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 motherboard.

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 Replace daughterboard.
4 Reseat display cable.

(Continued)

Troubleshooting Symptom Charts/Power - 5

Power

Screen is blank;
computer doesn’t
respond

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, daughterboard, and

motherboard connections.
5 Reset the power manager.
6 Replace keyboard.
7 Replace interconnect board.
8 Replace daughterboard.
9 Replace motherboard.

Troubleshooting Symptom Charts/Power

(Continued)

- 6

After removing main
battery, some
Control Panel
settings are different

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

Power

1 Replace interconnect board.
2 Replace daughterboard.
3 Replace motherboard.

1 Check battery charger connection.
2 Try known-good, charged main battery.
3 Try known-good power adapter.
4 Check battery thermistor cable connection.
5 Replace motherboard.

(Continued)

Troubleshooting Symptom Charts/Power

(Continued)

- 7

Low-power warning
appears

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

Power

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 motherboard.

1 Reseat battery to make sure it is mating with contacts on

2 If motherboard includes removeable fuse, replace fuse.
3 Replace motherboard.
4 Return computer to Apple.

(Continued)

adapter.

motherboard.

Troubleshooting Symptom Charts/Video - 8

Video

Pixel is always white 1 PowerBook 170, active matrix display only: If there are

more than five voids (pixels that are always white), or two

or more voids within one inch of each other, replace display

(CPRC/international repairers only) or return computer to

Apple.
2 PowerBooks 140, 145, and 145B, replace display.

Pixel is always black 1 PowerBook 170, active matrix display only: Replace display

(CPRC/ international repairers only) or return computer to

Apple.
2 PowerBooks 140, 145, and 145B, replace display.

Troubleshooting Symptom Charts/Video

(Continued)

- 9

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

Thin white line is
always on at middle of
screen

Video

1 Add shim to display cable. Refer to Additional Procedures.
2 Replace display cable.
3 Replace FSTN display (all repairers) or replace active-

4 Replace interconnect board.
5 Replace daughterboard.

For FSTN screens (PowerBook 140/145/145B), a thin white
line is normal. For active-matrix screens (PowerBook 170),
return display (CPRC/ international repairers only) or return
computer to Apple.

(Continued)

matrix display (CPRC/ international repairers only).

Troubleshooting Symptom Charts/Video

(Continued)

- 10

Display is very light
or totally white

Video

1 Adjust screen contrast (PowerBook 140/145/145B only).
2 Check display cable, inverter board, interconnect board,

3 Replace inverter board.
4 Replace interconnect board.
5 Replace display cable.
6 Replace FSTN display (all repairers) or replace active-

7 Replace daughterboard.
8 Replace motherboard.

(Continued)

daughterboard, and motherboard connections.

matrix display (CPRC/ international repairers only).

Troubleshooting Symptom Charts/Video

(Continued)

- 11

No display, but
computer appears to
operate correctly

Video

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

3 Replace inverter board.
4 Replace interconnect board.
5 Add shim to display cable. Refer to Additional Procedures.
6 Replace power cable.
7 Replace display cable.
8 Replace FSTN display (all repairers) or replace active-

9 Replace daughterboard.
10 Replace motherboard.

(Continued)

daughterboard, and motherboard connections.

matrix display (CPRC/ international repairers only).

Troubleshooting Symptom Charts/Video

(Continued)

- 12

Video

Rainbow colors
visible from extreme
viewing angles

Image is not uniform For FSTN screens (PowerBook 140/145/145B), irregularity in

Display stopped
working or dimmed
but is fine now

Such colors are normal for FSTN screens (PowerBook 140/145/
145B).

images is normal. Adjust contrast and brightness to diminish
effect. For active-matrix screens (PowerBook 170), replace
display (CPRC/ international repairers only) or return
computer to Apple.

If temperature is under 5 or over 40 degrees centigrade, this
reaction is normal for FSTN screens (PowerBook 140/145/
145B).

(Continued)

Troubleshooting Symptom Charts/Video

(Continued)

- 13

Backlight doesn’t
operate

Video

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

3 Replace inverter board.
4 Replace inverter display cable.
5 Replace interconnect board.
6 Add shim to display cable. Refer to Additional Procedures.
7 Replace display cable.
8 Replace FSTN display (all repairers) or replace active-

9 Replace daughterboard.
10 Replace motherboard.

(Continued)

daughterboard, and motherboard connections.

matrix display (CPRC/ international repairers only).

Troubleshooting Symptom Charts/Video

(Continued)

- 14

Video

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

2 Check display cable connection.

Two black horizontal
lines appear; screen
intermittently goes
dark

Screen flickers Add shim to display cable. Refer to Additional Procedures.

Add shim to display cable. Refer to Additional Procedures.

(Continued)

Troubleshooting Symptom Charts/Floppy Drive - 15

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 daughterboard.
6 Replace motherboard.

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 motherboard.

Troubleshooting Symptom Charts/Floppy Drive

(Continued)

- 16

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 daughterboard.
7 Replace motherboard.

Disk initialization
fails

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

(Continued)

Troubleshooting Symptom Charts/Floppy Drive

(Continued)

- 17

Read/write/copy
error

Floppy Drive

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

(Continued)

Troubleshooting Symptom Charts/Hard Drive - 18

Hard Drive

Internal hard drive
does not operate

1 Disconnect external SCSI devices.
2 Check internal hard drive data cable connection.
3 Use HD SC Setup to reinitialize drive.
4 Replace internal hard drive data cable.
5 Replace internal hard drive.
6 Replace motherboard.

Troubleshooting Symptom Charts/Peripherals - 19

Peripherals

After connecting
external SCSI device,
computer doesn’t boot

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

at beginning and end.
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 motherboard.

Troubleshooting Symptom Charts/Peripherals

(Continued)

- 20

Cursor does not move
when using trackball

Cursor intermittently
does not move or
moves erratically

Peripherals

1 Press reset switch.
2 Check interconnect board, daughterboard, and motherboard

connections.
3 Try low-power mouse. If cursor moves, replace trackball or

keyboard.
4 Replace interconnect board.
5 Replace daughterboard.
6 Replace motherboard.

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

(Continued)

Troubleshooting Symptom Charts/Peripherals

(Continued)

- 21

Cursor moves, but
clicking trackball
button has no effect

Cursor does not move
when using mouse

Peripherals

1 Check interconnect board, daughterboard, and motherboard

connections.
2 Replace trackball.
3 Replace keyboard.
4 Replace interconnect board.
5 Replace daughterboard.
6 Replace motherboard.

1 Check mouse connection to ADB port.
2 Press reset switch.
3 Clean mouse ball and inside mouse.
4 Replace mouse.
5 Replace motherboard.

(Continued)

Troubleshooting Symptom Charts/Peripherals

(Continued)

- 22

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, and

interconnect board to daughterboard.
3 Replace keyboard.
4 Replace interconnect board.
5 Replace daughterboard.

1 Verify that System is 7.0.1 or later.
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 daughterboard.
7 Replace motherboard.

(Continued)

Troubleshooting Symptom Charts/Peripherals

(Continued)

- 23

Known-good
LaserWriter does not
print

Device connected to
external modem port
doesn’t work

Peripherals

1 Verify that System is 7.0.1 or later.
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 Networks and Communications manual.
6 Replace daughterboard.
7 Replace motherboard.

1 Verify that External Modem is selected in CDEV.
2 Verify that System is 7.0.1 or later.
3 Check cables.
4 Attach device to known-good computer.
5 Replace daughterboard.
6 Replace motherboard.

(Continued)

Troubleshooting Symptom Charts/Peripherals

(Continued)

- 24

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

Peripherals

1 Verify that System is 7.0.1 or later.
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 daughterboard.
7 Replace motherboard.

(Continued)

Troubleshooting Symptom Charts/Internal Modem - 25

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 7.0.1 or later.
3 Replace modem card.
4 Replace motherboard.

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 7.0.1 or later.
5 Replace modem card.

Troubleshooting Symptom Charts/Internal Modem

(Continued)

- 26

Strange mix of
characters appears
onscreen

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 7.0.1 or later.
5 Replace modem card.
6 Replace daughterboard.
7 Replace motherboard.

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

(Continued)

Troubleshooting Symptom Charts/Internal Modem

(Continued)

- 27

Modem does not
respond to incoming
call

Modem has no sound
output

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 motherboard.

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

(Continued)

Troubleshooting Symptom Charts/Internal Modem

(Continued)

- 28

Modem connects but
does not communicate
with remote modem

Internal Modem

1 Verify that remote modem needs error correction (error

correction is internal modem default).
2 Type &Q0 to disable error correction.

(Continued)

Troubleshooting Symptom Charts/Miscellaneous - 29

Miscellaneous

Screen goes blank and
computer shuts down
every few minutes

Application seems to
run slower after few
seconds

Hard disk 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)

- 30

No sound from
speaker

Miscellaneous

1 Verify that volume setting in Control Panel is 1 or above.
2 Check connections of speaker to interconnect board,

interconnect board to daughterboard, and daughterboard to

motherboard.
3 Replace interconnect board.
4 Replace daughterboard.
5 Replace motherboard.

(Continued)

K

Service Source

T ak e Apart

PowerBook 140/145/145B/170

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.

Before removing

Take Apart Main Battery - 2

±

Warning:

battery is a NICAD battery
that contains toxic
materials. Send undamaged,
dead batteries to Apple for
recycling—do not discard
dead batteries with other
waste. If the battery is
damaged, do not return it to
Apple. Dispose of damaged
batteries according to local
ordinances. Review battery
handling and disposal
instructions in Bulletins/
Safety.

The main

Take Apart Main Battery - 3

1 Slide open the battery

door.

2 Using the battery door as

a handle, pull out the
main battery.

Take Apart Main Battery - 4

3 Slide the battery door

completely open.

4 Pull the end tab until it

releases and remove the
door from the battery.

End Tab

Take Apart I/O Door - 5

I/O Door

No preliminary steps are
required before you begin
this procedure.

I/O Door

Caution:

PowerBook140/145/170
contains CMOS devices that
are very susceptible to ESD
damage. To prevent damage,
wear a grounding
wriststrap. Review the ESD
precautions in Bulletins/
Safety.

The

Take Apart I/O Door - 6

1 Open the I/O door.

2 Carefully bend the door

so that the middle bows

Right Door
Peg

outward and unhinge the
two bottom door pegs.

Take Apart Top Case - 7

Top Case

Before you begin, remove
the following:

• Main battery

• I/O door

Top Case

Caution:

PowerBook140/145/170
contains CMOS devices that
are very susceptible to ESD
damage. To prevent damage,
wear a grounding
wriststrap.Review the ESD
precautions in Bulletins/
Safety.

The

Take Apart Top Case - 8

1

Note:

Use a T-8 torx
driver to remove the
small screw from the
rear connector panel
and a T-10 torx driver
to remove the other case
screws.

Remove the five torx
screws from the bottom
case.

Take Apart Top Case - 9

2 Lift up the top case and

disconnect the
interconnect cable.

3 Lift off the top case and

Interconnect
Ribbon
Cable

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

Tab Fastener

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 - 10

Hard Drive

Before you begin, remove
the following:

• Main battery

• I/O door

• Top case

• Modem card (if present)

Hard Drive

Caution:

PowerBook140/145/170
contains CMOS devices that
are very susceptible to ESD
damage. To prevent damage,
wear a grounding
wriststrap. Review the ESD
precautions in Bulletins/
Safety.

The

Take Apart Hard Drive - 11

1

Caution:

The hard drive
ribbon cable is fragile.
Handle it with care.

Lift the locking tab on
connector J11 and
remove the hard drive

Locking
Tab

ribbon cable from the
motherboard.

J11 Connector

Take Apart Hard Drive - 12

2 Using a T-8 torx driver,

remove the five screws
from the drive retainer.

3 Using a jeweler’s

screwdriver, release the
drive retainer latch and
remove the retainer.

Take Apart Hard Drive - 13

4 Lift the hard drive out of

the bottom case.

5

Note:

If the hard drive
does not have a release
tab, carefully pry the
cable from the drive
with a screwdriver.

Release Tab

Pull the release tab and
disconnect the hard drive
cable.

Take Apart Hard Drive - 14

Replacement Note:

retainers for 17-mm-high
and 19-mm-high hard
drives are not
interchangeable. Check the
height of the replacement
drive and use the
appropriate drive retainer.
For hard drive upgrades,
refer to Upgrades.

Replacement Note:

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

Drive

For

Take Apart Floppy Drive - 15

Floppy Drive

Before you begin, remove
the following:

• Main battery

• I/O door

Floppy Drive

• Top case

• Modem card (if present)

Caution:

140/145/170 contains
CMOS devices that are very
susceptible to ESD damage.
To prevent damage, wear a
grounding wriststrap.
Review the ESD precautions
in Bulletins/Safety.

The PowerBook

Take Apart Floppy Drive - 16

1

Caution:

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

Lift the locking tab on

Locking
Tab

J9 Connector

connector J9 and remove
the floppy drive ribbon
cable from the
motherboard.

Take Apart Floppy Drive - 17

2 Using a T-8 torx driver,

remove the five torx
screws from the drive
retainer.

3 Using a jeweler’s

screwdriver, release the
drive retainer latch and
remove the retainer.

Take Apart Floppy Drive - 18

4 Lift the floppy drive out

of the bottom case.

5 Using a jeweler’s

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

Take Apart Trackball Assembly - 19

Trackball Assembly

Before you begin, remove
the following:

• Main battery

Trackball
Assembly

• I/O door

• Top case

Caution:

PowerBook140/145/170
contains CMOS devices that
are very susceptible to ESD
damage. To prevent damage,
wear a grounding
wriststrap. Review the ESD
precautions in Bulletins/
Safety.

The

Take Apart Trackball Assembly - 20

1

Trackball

Ribbon Cable

Locking

Tab

Caution:

ribbon cable is fragile
and should be handled
with care.

The trackball

Pull out the locking tab on
the trackball connector and
remove the trackball
ribbon cable.

Take Apart Trackball Assembly - 21

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 - 22

Keyboard

Before you begin, remove
the following:

• Main battery

• I/O door

Keyboard

• Top case

• Trackball assembly

Caution:

PowerBook140/145/170
contains CMOS devices that
are very susceptible to ESD
damage. To prevent damage,
wear a grounding
wriststrap. Review the ESD
precautions in Bulletins/
Safety.

The

Take Apart Keyboard - 23

1

Caution:

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

Keyboard
Ribbon Cables

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

Take Apart Keyboard - 24

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 - 25

Inverter Board

Before you begin, remove
the following:

• Main battery

• I/O door

• Top case

Inverter Board

Caution:

140/145/170 contains
CMOS devices that are very
susceptible to ESD damage.
To prevent damage, wear a
grounding wriststrap.
Review the ESD precautions
in Bulletins/Safety.

The PowerBook

Take Apart Inverter Board - 26

Important:

matrix and three FSTN
displays are used with the
PowerBook 140/145/170
computers. Each display
requires a matching
inverter. When replacing a
display or inverter board,
refer to the “Display
Compatibility Matrix” in
Basics and to Service
Source parts database for
the correct part number for
each board.

One active-

Take Apart Inverter Board - 27

1 If present, remove the

inverter shield.

Inverter Shield

2 Remove the two screws

and pull the inverter
board straight up to

Inverter
Cable

disconnect it from the
interconnect board.

Inverter
Board

3 Disconnect the inverter

cable.

Take Apart Inverter Board - 28

Replacement Note:

inverter shields on all
PowerBook 140/145/170
computers. Inverter shields
are available on the 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.

Install

Take Apart Inverter Board - 29

Brightness Pot Contrast Pot

Actuator Actuator

Inverter
Board

Replacement Note:

For
systems with FSTN displays,
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 - 30

Interconnect Board

Before you begin, remove
the following:

• Main battery

• I/O door

• Top case

• Inverter board

Interconnect Board

Caution:

PowerBook140/145/170
contains CMOS devices that
are very susceptible to ESD
damage. To prevent damage,
wear a grounding
wriststrap.Review the ESD

precautions in Bulletins/

The

Take Apart Interconnect Board - 31

Safety.

±

J3 Connector

J5 Connector

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 connectors J5 and J3
and remove the
keyboard ribbon cables.

The

The keyboard

Take Apart Interconnect Board - 32

2 Pull out the locking tab

on connector J2 and
remove the display
cable.

Note:

If you also plan to
remove the display or the
display cable, separate the

Ferrite
Bead

display cable ferrite bead
from the top case. You may
need to use a small flat­blade screwdriver to pry
off the ferrite bead.

J2 Connector

Replacement Note:

Connect
the display cable before
replacing the interconnect
board.

Take Apart Interconnect Board - 33

3 Using a T-8 torx driver,

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

Take Apart Actuators - 34

Actuators

Before you begin, remove
the following:

• Main battery

• I/O door

• Top case

• Inverter board

Actuators

Caution:

PowerBook140/145/170
contains CMOS devices that
are very susceptible to ESD
damage. To prevent damage,
wear a grounding
wriststrap. Review the ESD
precautions in Bulletins/
Safety.

The

Take Apart Actuators - 35

Note:

The PowerBook 170
has a brightness actuator
only (contrast is preset).
The PowerBook 140 has

both contrast and
brightness actuators.

Pull up and rotate the
actuator toward the display
to remove it from the top
case.

Take Apart Elevation Feet - 36

Elevation Feet

Before you begin, remove
the following:

• Main battery

• I/O door

• Top case

Elevation Foot

Elevation Foot

Caution:

140/145/170 contains
CMOS devices that are very
susceptible to ESD damage.
To prevent damage, wear a
grounding wriststrap.
Review the ESD precautions
in Bulletins/Safety.

The PowerBook

Take Apart Elevation Feet - 37

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 Daughterboard - 38

Daughterboard

Before you begin, remove
the following:

• Main battery

• I/O door

• Top case

• RAM expansion card (if

present)

Daughterboard

Take Apart Daughterboard - 39

Logic Board
Take-Apart

Tool

Daughterboard

Motherboard

Caution:

The PowerBook
140/145/170 contains
CMOS devices that are very
susceptible to ESD damage.
To prevent damage, wear a
grounding wriststrap.
Review the ESD precautions
in Bulletins/Safety.

1 Using a T-8 torx driver,

remove the four
daughterboard mounting
screws.

Caution: Always use the
logic board take-apart tool
to separate the
daughterboard connector
from the motherboard

Take Apart Daughterboard - 40

connector. Trying to
disconnect the
daughterboard from the
motherboard by rocking or
peeling the boards apart
damages the connectors.

2 Using the logic board

take-apart tool,
disconnect the
daughterboard from the
motherboard.

Note: For tools ordering
information, refer to
“Special Tools” in
Bulletins/Service Notices.

Take Apart Motherboard - 41

Motherboard

Before you begin, remove
the following:

• Main battery

• I/O door

• Top case

• RAM expansion card (if

present)

• Daughterboard

• Modem board (if present)

Motherboard

Take Apart Motherboard - 42

Floppy Drive Cable

Thermistor Cable

Locking Tab

Locking

Tabs

Hard Drive Cable

Caution: The PowerBook
140/145/170 contains
CMOS devices that are very
susceptible to ESD damage.
To prevent damage, wear a
grounding wriststrap.
Review the ESD precautions
in Bulletins/Safety.

1 Caution: The hard drive,

floppy drive, and
thermistor cables are
fragile. Handle them
with care.

Lift up the locking tabs
and remove the hard
drive, floppy drive, and

Take Apart Motherboard - 43

Hex Nut Screw

Motherboard

battery thermistor
cables.

2 Remove the two hex nut

screws and lift the
motherboard out of the
bottom case.