Apple powerbook 1400 Service Manual

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Service Source

PowerBook 1400

PowerBook 1400c/117, /133, /166,

PowerBook 1400cs/117, /133, /166

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Service Source

Hot Issues

PowerBook 1400 Series

Hot Issues Overview - 1

Overview

This chapter is designed to highlight unique or high­priority product issues that you should be aware of before
servicing the PowerBook 1400.

This chapter alerts you to important issues and provides
links to other areas in the manual where more complete
information can be found. This chapter is not intended to
replace other parts of this manual; it merely provides a
pointer to pertinent information in those chapters.

The date the Hot Issue was published is indicated in
parentheses after the title.

Hot Issues Bottom Case Latch Replacement (2/98) - 2

Bottom Case Latch Replacement (2/98)

Issue:

The latches on the bottom case battery and media bays
may come off. The latches are replaceable. Please replace
the latches for customers rather than replacing the entire
Bottom Case Assembly.

Parts Identification:

Latch, Bottom Case, PB 1400. The latches come in a package
of five.

Replacement Procedure:

“Bottom Case Latch Replacement” in the Additional
Procedures chapter of this manual.

Order Replacement Part 922-3304:

For detailed instructions, see

Hot Issues Logic Board Identification (2/98) - 3

Logic Board Identification (2/98)

Issue:

There are two logic boards with ROM version 3 that
could be used in the PowerBook 1400, 117MHz and the
PowerBook 1400, 133 MHz units. Because dealers must
return the same part they ordered to receive
reimbursement, it is important to properly identify the
logic board before ordering a replacement.

Part Number 661-1188 has ROM U3 (Low, 341S0203)
and ROM U4 (High, 341S0204). It works in PowerBook
1400, 117 MHz and 133 MHz units.

Part number 661-1381 has ROM U3 (Low, 341S0364)
and ROM U4 (High, 341S0365). It works in PowerBook
1400, 117 MHz, 133 MHz, and 166 MHz units.

You may receive a 661-1381 logic board as a replacement
for a 661-1188 if that is the board currently in service

Hot Issues Logic Board Identification (2/98) - 4

stock. Since it will work in all the PowerBook 1400 units,
this should not pose a problem to customers or Service
Providers.

Parts Identification:

1400, 117 MHz units, remove the factory-installed
Memory Expansion Card (the card closest to the
Microprocessor Daughterboard).

To check the ROMs on the PowerBook 1400, 133 MHz units,
remove both the factory-installed Memory Expansion Card
and the Microprocessor Unit Daughterboard.

For instructions on removing any of these parts, see the
Take Apart chapter of the PowerBook 1400 manual.

To check the ROMs on the PowerBook

Hot Issues Door Replacement for PowerBook 1400 CD-ROM Drives (12/

Door Replacement for PowerBook
1400 CD-ROM Drives (12/97)

Issue:

The doors of the CD-ROM drives used with the
PowerBook 1400 media bay may break at the tabs used to
attach it to the drive mechanisms tray. These doors are
replaceable. Please replace the door for customers rather
than replacing the entire CD-ROM assembly.

Solution:

replacement procedures, see “Door Replacement for CD­ROM Drives” in the Additional Procedures chapter of this
manual.

For more information on parts identification and

Hot Issues 1 GB Hard Drives Formatted Improperly (2/97) - 6

1 GB Hard Drives Formatted Improperly (2/97)

Issue:

PowerBook 1400 computers that shipped with one
gigabyte (1 GB) hard drives were formatted improperly.
The improper formatting caused 1 GB hard drives to appear
to have only 750 MB of total disk space.

Solution:

at Apple's manufacturing site. This issue should no longer be
a factor in any new PowerBook 1400 computers. Follow the
steps below for identifying models of the PowerBook 1400
that shipped with 1 GB drives, determining whether these
drives were formatted improperly, and reformatting the
hard drives.

This formatting issue has been noted and corrected

Hot Issues 1 GB Hard Drives Formatted Improperly (2/97) - 7

Which models shipped with a 1 GB hard drive?

Not all PowerBook 1400 computers shipped with 1 GB hard
drives. Only the following models shipped with 1 GB hard
drives.

• M4856 Macintosh PowerBook 1400c/117

• M5576 Macintosh PowerBook 1400c/133

How can I tell if the 1 GB hard drive is formatted improperly?

If you aren't sure whether or not the hard drive has been
improperly formatted, do the following:

1 Open the hard drive window.

2 Pull down the View menu.

3 Select "by icon" from the menu.

4 Add up the numbers for "in Disk" and "available". If

these numbers add up to approximately 750 MB, then

Hot Issues 1 GB Hard Drives Formatted Improperly (2/97) - 8

the drive will need to be reformatted to obtain the full
size of 1 GB.

How do I reformat the hard drive?

If the PowerBook computer has an improperly formatted
hard drive, follow the steps below to reformat the drive.

Important:

data files on the drive to be permanently erased. Be sure to
save important files to other media before reformatting.

1 Back up the important data from the hard drive to

another hard drive or to floppy disks. All of the software
that came with the computer is contained on the CD that
came with it, so you only need to back up files created by
the customer.

2 Start up from the PowerBook System CD.

Reformatting the hard drive will cause all the

Hot Issues 1 GB Hard Drives Formatted Improperly (2/97) - 9

3 Run Drive Setup to reformat/initialize the hard drive.

4 Restore all the software from the PowerBook 1400 CD.

5 Restart the PowerBook and check the hard drive window.

The amount of space "in disk" and "available" should total
1 GB.

Hot Issues Missing HD Reference File (2/97) - 10

Missing HD Reference File (2/97)

Issue:

A reference file needed by the system was
installed on the PowerBook 1400’s hard drive during the
manufacturing process. As a result, if customers use a Disk
Utility program (such as Apple’s Disk First Aid) that
addresses this reference file, they will receive an error
message. For example, customers using Disk First Aid to
verify their hard drive will see the error message, “This is
not an HFS disk.”

The absense of this file does not compromise data integrity
in any way and the error messages do not necessarily
indicate that the customer is experiencing a problem with
their PowerBook 1400. It only affects disk utility programs
that attempt to address this reference file and it is easily
corrected.

not

Hot Issues Missing HD Reference File (2/97) - 11

Solution:

problem. A Read Me file included with the updater provides
customers with step-by-step instructions for installing the
updater and explains why they need it.

Customers with access to the internet will find two files—
“PB 1400 HD Updater 1.0” (the Read Me file) and “PB
1400 HD Updater 1.0.sea,” using the following path:

Apple SW Updates/US/Macintosh/PowerBook/PB 1400/
PB 1400 HD Updater 1.0/PB 1400 HD Updater 1.0.sea

Service Providers or customers can also order the PB 1400
Updater on a floppy disk by calling 1-888-243-0008.

The “PowerBook 1400 HD Updater” corrects this

Hot Issues PowerBook 1400: Video-Out Upgrade Kit Ships with Wrong

PowerBook 1400: Video-Out Upgrade
Kit Ships with Wrong Screws (2/97)

Issue:

Some of the initial Macintosh PowerBook 1400 8-bit
Video-Out Upgrade Kits (M4509LL/A) shipped with the
wrong screws. Instead of two (2) short Phillips-head
screws, the product was packaged with one (1) long and one
(1) short torx-8 screws.

Solution:

future shipments of the product will contain the correct
screws. To assist customers who received the wrong screws,
Apple has made the correct ones available via Support
Related Fulfillment, as follows:

This packaging error has been corrected, and

Part Number Description

LGX-0098 Screw Kit

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Service Source

Basics

PowerBook 1400 Series

Basics Product Overview - 1

Product Overview

The PowerBook 1400 Series
is the first PowerBook to
support fully modular
features. Customers can
upgrade their floppy drive,
CD-ROM drive, and
expansion memory.
Customers can also replace
the removable panel on the
top of the case with a clear
or colored panel that came
with the system.

CD-ROM Drive
or
Floppy Drive

The PowerBook 1400 Series
features a PowerPC 603e
RISC microprocessor

Basics Product Overview - 2

running at 117, 133, or 166 MHz; built-in PC Card
technology; and infrared communication. Also offered are
two PowerBook displays: a dual-scan passive matrix
(FSTN) or an active matrix (CTFT).

Basics System Configurations - 3

System Configurations

The PowerBook 1400 Series computers come in the
following configurations:

PowerBook 1400cs (October ‘96)

• Processor: 117 MHz PowerPC 603e

• RAM/Hard drive: 12 MB/750 MB or 16 MB/750 MB/CD

• Display: 11.3" dual-scan passive matrix (FSTN)

• Battery: 2-4-hour NiMH

• Weight: 6.7 lb. with floppy drive; slightly more with

CD-ROM drive

Basics System Configurations - 4

PowerBook 1400c (October ‘96)

• Processor: 117 MHz PowerPC 603e

• RAM/Hard drive: 16 MB/1 GB/CD

• Display: 11.3" active matrix (CTFT)

• Battery: 2-4-hour NiMH

• Weight: 6.6 lb. with floppy drive; slightly more with

CD-ROM drive

PowerBook 1400c/133 (February ‘97)

• Processor: 133 MHz PowerPC 603e with 256 KB L2

cache

• RAM/Hard drive: 16 MB/1 GB/CD or 16 MB/1.3 GB/CD

• Display: 11.3" active matrix (CTFT)

• Battery: 2-4-hour NiMH

• Weight: 6.6 lb. with floppy drive; slightly more with

CD-ROM drive

Basics System Configurations - 5

PowerBook 1400cs/133 (April ‘97)

• Processor: 133 MHz PowerPC 603e with 256 KB L2

cache

• RAM/Hard drive: 12 MB/1 GB or 16 MB/1.3 GB/CD

• Display: 11.3" dual-scan matrix (FSTN)

• Battery: 2-4-hour NiMH

• Weight: 6.7 lb. with floppy drive; slightly more with

CD-ROM drive

PowerBook 1400c/166 (June ‘97)

• Processor: 166 MHz PowerPC 603e with 256 KB L2

cache

• RAM/Hard drive: 16 MB/2 GB/CD

• Display: 11.3" active matrix (CTFT)

• Battery: 2-4-hour NiMH

• Weight: 6.6 lb. with floppy drive; slightly more with

CD-ROM drive

Basics System Configurations - 6

PowerBook 1400cs/166 (November ‘97)

• Processor: 166 MHz PowerPC 603e with 256 KB L2

cache

• RAM/Hard drive: 16 MB/2 GB/CD

• Display: 11.3" active matrix (CTFT)

• Battery: 2-4-hour NiMH

• Weight: 6.6 lb. with floppy drive; slightly more with

CD-ROM drive

Basics Repair Strategy - 7

Repair Strategy

Service the PowerBook 1400 Series computers through
module exchange and parts replacement. Customers can
request on-site service from an Apple Authorized Service
Provider Plus (AASP+) Apple Assurance (US only), or
request a courier through the Apple Canada Technical
Answerline (Canada only). They can also choose carry-in
service from an AASP.

Ordering

Apple Service Providers planning to support the computer
systems covered in this manual may purchase Service
modules and parts to develop servicing capability. To order
parts, use the AppleOrder (US only) or ARIS (Canada only)
system and refer to “Service Price Pages.”

Basics Repair Strategy - 8

Large businesses, universities, and K-12 accounts must
provide a purchase order on all transactions, including
orders placed through the AppleOrder (US only) or ARIS
(Canada only) system.

USA Ordering

US Service Providers not enrolled in AppleOrder may fax
their orders to Service Provider Support (512-908-

8125) or mail them to

Apple Computer, Inc.
Service Provider Support
MS 212-SPS
Austin, TX 78714-9125

For US inquiries, please call Service Provider Support at
800-919-2775 and select option #1.

Basics Repair Strategy - 9

Canadian Ordering

Canadian Service Providers not enrolled in ARIS may fax
their orders to Service Provider Support in Canada
(1-800-903-5284). For Canadian inquiries, please call
Service Provider Support at 905-513-5782 and select
option #3.

Basics Warranty/AppleCare/ARIS - 10

Warranty/AppleCare/ARIS

US Only

The PowerBook 1400 Series computers are covered under
the Apple One-Year Limited Warranty. The AppleCare
Service Plan is also available for these products. Service
Providers are reimbursed for warranty and AppleCare
repairs made to these computers. For pricing information,
refer to “Service Price Pages.”

Canada Only

The PowerBook 1400 Series computers are covered under
first-year AppleCare. The Extended AppleCare Service Plan
is also available for these products. Service Providers are
reimbursed for first-year warranty and Extended
AppleCare repairs made to these computers. For pricing
information, refer to “Service Price Pages.”

Basics Front View - 11

Front View

Battery

Microphone

CD-ROM Drive
or
Floppy Drive

Sleep
Indicator

Brightness
Control

Contrast
Control

The front of the computer
includes the battery, floppy
drive or CD-ROM drive,
microphone, contrast
control, brightness control,
and sleep indicator.

Basics Side View - 12

Side View

The left side panel contains
two PC Card (PCMCIA card)
slots and PC Card eject
buttons.

PC Card
Eject Buttons

Two PC Card
(PCMCIA Card) Slots

Basics Rear Panel - 13

Rear Panel

The rear panel contains the
I/O ports, reset button,

Sound
Output Port

Power
Adapter Port

Sound
Input Port

Expansion Port

SCSI Port
(HDI-30)

Apple Desktop
Bus (ADB) Port

Reset
Button

Security
Slot

Infrared
Window

Printer/External
Modem Port

infrared window, and
security slot.

Basics Logic Board - 14

Logic Board

Speaker

Drive

Display

PCMCIA

Microprocessor

Daughter-

Board

Keyboard

TrackpadHard

Inverter

Video

Factory

RAM

CD-ROM

Drive

Customer

RAM

Floppy

Drive

The logic board contains the
daughterboard and optional
factory-installed and
customer-installed memory
expansion cards. It also
contains numerous
connectors.

Basics Cable Matrix - 15

Cable Matrix

For a matrix of cables that work with specific models of the
PowerBook family of computers, select the PowerBook Cable
Matrix located in Hardware/Compatibility Charts.

Basics Battery Information - 16

Battery Information

Warning:

1400 Series or an identical model. Batteries designed for
other portable computers may look similar, but they may
not work with your computer and may damage it.

Use only the battery supplied with the PowerBook

Battery Matrix

For a matrix of batteries that work with specific models of
the PowerBook family of computers, select the PowerBook
Battery Matrix located in Hardware/Compatibility Charts.

Basics Battery Information - 17

Nickel-Metal-Hydride Batteries

The PowerBook 1400 Series
computers use nickel­metal-hydride (NiMH)
batteries. Each battery
provides power for up to
four hours of work time,
depending on the system
configuration and battery
conservation features
employed.

Basics Battery Information - 18

Battery Handling Guidelines

The following are guidelines for properly handling the
PowerBook 1400 Series batteries:

Warning:

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

• Handle the battery carefully. Do not drop, puncture,

mutilate, or burn it.

• Do not leave a battery in the computer for longer than a

week without plugging in the power adapter.

NiMH batteries contain hazardous chemicals. Send

Basics Battery Information - 19

• Always put the battery cap on the battery when the

battery is out of the PowerBook. The battery contacts
should not be exposed when the battery is out of the
computer.

• Do not leave the battery in hot locations (such as the

trunk of a car).

• Do not store a battery for longer than six months without

recharging it.

• Recharge batteries only as described in the user’s manual

and only in ventilated areas.

Basics PC Card Handling - 20

PC Card Handling

Two PC Card slots (also
known as PCMCIA slots) are
featured in the PowerBook
1400 Series. The two slots
accept a variety of third­party PC Cards with 68-pin
connectors.

There are three types of PC
Cards: Type I (3.3 mm),
Type II (5 mm), and Type III
(10.5 mm). Type I and Type
II cards fit in either the
upper or lower slot of the PC
Card unit. Type III cards can
only be placed in the lower

Basics PC Card Handling - 21

slot. When a Type III card is in the lower slot, the upper slot
cannot be used.

The following are guidelines for properly handling PC Cards:

• Use only cards that are compatible with the PC Card unit.

Refer to the compatibility information that came with the
card. If you cannot find the compatibility information,
call the card vendor.

• Use an SRAM card for extra storage only. If this type of

PC Card is used to start up the computer, an error
message will be received.

• Do not insert anything other than a PC Card into the card

slots.

• The computer must be on or off in order to eject a PC

Card. When the computer is in sleep mode, a PC Card
cannot be ejected.

Basics PC Card Handling - 22

• Before you eject a card, make sure nothing is blocking

the card’s slot.

• If you want to use the card again immediately, pull it out

about an inch more and then push it back in. If you don’t
follow this procedure and try to push the card back in to
use it again, the card will not engage properly.

• Do not pull on a PC Card before it has been ejected out of

the slot. Forcing a PC Card out of the slot may damage the
computer or the card.

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Service Source

Specifications

PowerBook 1400 Series

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:

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

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

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

down main menu.

— 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

Cache

PowerPC 603e microprocessor running at 117 MHz
PowerPC 603e microprocessor running at 133 MHz
PowerPC 603e microprocessor running at 166 MHz

256 KB second-level (L2) cache

Specifications Memory - 3

Memory

RAM

ROM

VRAM

12 or 16 MB of low-power DRAM
Customer-upgradeable
Expandable to 64 MB using TSOP low-profile RAM chips rated at

70 ns access time or faster

4 MB ROM

1 MB VRAM

Specifications Disk Storage - 4

Disk Storage

Floppy Drive

Hard Drives

CD-ROM Drive

Removable 1.44 MB floppy drive (in the expansion bay or packed

separately if a CD-ROM drive is installed in the expansion
bay). Reads and writes Macintosh 1.4 MB floppy disks and
Windows, DOS, and OS/2 720K and 1.44 MB floppy disks;
reads Macintosh 800K disks

750 MB, 1 GB, 1.3 GB, or 2 GB 2.5" hard drive

Removable 6x-speed, 8x-speed, or 12x-speed CD-ROM drive (in

the expansion bay, if included)

Specifications I/O Interfaces - 5

I/O Interfaces

SCSI

PC Cards

ADB

SCSI port (HDI-30 connector) for hard drives, CD-ROM drives,

scanners, printers, and other devices; also supports
PowerBook SCSI disk mode

Two PC Card (PCMCIA card) slots support either two Type I or

Type II cards or one Type III card

Apple Desktop Bus (ADB) port for keyboard, mouse, or other

input devices using a low-speed, synchronous serial bus
200 mA maximum current draw for all ADB devices
Supports up to three ADB devices in a daisy chain (provided the

maximum current draw does not exceed the 200 mA limit)

Specifications I/O Interfaces - 6

Serial

Sound

Infrared

Power Adapter

Serial port for printers, modems, LocalTalk network, or other

serial devices (RS-422)

Sound output port for external audio amplifier/powered speakers,

stereo mini-jack, 3-connector, standard 3.5 mm stereo

miniplug; sound input port for stereo sound input (line level),

stereo mini-jack, 3-connector, standard 3.5 mm stereo

miniplug
16-bit stereo sound in and out supports 44.1 kHz, 22 kHz, and 11

kHz sample rates

Built-in infrared send and receive unit

Power adapter port

Specifications I/O Interfaces - 7

Security

Users may attach a security device such as the Kensington

Security Connector.

Specifications Expansion Interfaces - 8

Expansion Interfaces

Expansion Slots

Expansion Bay

Expansion slot for optional user-installable card adds a connector

that can provide a video port, an Ethernet network connection,

or another device
Expansion slot for user-installable RAM expansion card. (Card

has connectors for optional second card plug-in.)

Expansion bay accepts a removable expansion bay module (floppy

drive, CD-ROM drive, stored NiMH battery, or other modules)

Specifications I/O Devices - 9

I/O Devices

Keyboard

Trackpad

Microphone

Built-in keyboard with 12 function keys
76 keys domestic, 77 keys ISO

3.0 mm travel keyboard
19 mm vertical and horizontal pitch

Integrated, solid-state trackpad

Internal, electret, omnidirectional microphone

Specifications Video - 10

Video

Macintosh
PowerBook 1400cs
Video Display

Macintosh
PowerBook 1400c
Video Display

11.3" diagonal, 800 x 600 dual-scan passive matrix (FSTN);

thousands of colors

11.3" diagonal, 800 x 600 active matrix (CTFT); thousands of

colors

Specifications Electrical - 11

Electrical

Main Battery

Power Adapter

Backup Battery

Rechargeable nickel-metal-hydride (NiMH) battery
2-4 hours of use before recharging
Recharge time: slightly more than 2 hours

100-240 VAC line voltage
45 W, 50-60 Hz

50 milliamp-hour rechargeable battery for calendar/clock

maintenance. Also backs up contents of RAM for a few minutes

while battery is changed (when PowerBook is in sleep mode)

Specifications Physical - 12

Physical

Dimensions

Weight

Height: 2.0 in. (54 mm)
Width: 11.5 in. (292 mm)
Depth: 9.0 in. (229 mm)

6.6 lb. (3.0 kg) with floppy drive expansion module
If the floppy drive is replaced with a CD-ROM drive, add .14 kg

(0.3 lb.) to the computer’s weight

Specifications Environmental - 13

Environmental

Operating
Temperature

Storage
Temperature

Relative Humidity

Operating Altitude

Shipping/Non­Operating Altitude

41° to 95° F (5° to 35° C)

14° to 140° F (-10° to 60° C) Nickel-metal-hydride

-13° to 140° F (-25° to 60° C)

20% to 80% noncondensing

10,000 ft. (3,048 m) maximum

15,000 ft. (4,572 m) maximum

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Service Source

Troubleshooting

PowerBook 1400 Series

Troubleshooting General - 1

General

In each product manual on Service Source, you will find
Flowcharts and/or Symptom Charts designed to help you
diagnose and repair Apple computers.

If you have narrowed the problem down to a particular
symptom, start with the Symptom Charts. Because cures are
listed 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.

If you are not sure what the problem is, or if the Symptom
Charts do not resolve the problem, refer to the Flowcharts.

If you require additional assistance, contact Apple Technical
Support. Refer to the About topic under the Do menu for the
Apple Technical Support phone number.

Troubleshooting Symptom Charts/Startup - 2

Symptom Charts

Startup

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

1 Remove RAM card (if present) and restart computer. If

startup sequence is normal, replace RAM card and retest.
2 Reseat RAM card and check connection.
3 Replace RAM card.
4 Replace logic board.

Troubleshooting Symptom Charts/Startup - 3

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

Startup failure
occurs when using
minimum System
Folder and System

7.5.2.

1 Reset PRAM. (See Power Manager and PRAM Reset in

Additional Procedures.)
2 Remove floppy drive from media bay and restart computer. If

startup sequence is normal, insert floppy drive and retest.
3 Replace floppy mechanism.
4 Disconnect hard drive cable from hard drive and restart

computer. If startup sequence is normal, reconnect cable and

retest.
5 Replace hard drive.
6 Replace logic board.

Upgrade to System Enabler 1.2.1 or later. Refer to Apple Software
Updates on Service Source Companion CD.

Troubleshooting Symptom Charts/Power - 4

Power

Note:

You will hear only the click of the power-on button when
you attempt to start up a computer that lacks sufficient power to
start.

Computer won’t
power up

1 If sleep LED is continually on, backup battery power has been

interrupted. Restart computer by holding down reset actuator
10-20 seconds. If computer doesn’t restart, repeat 3–4

times.
2 Try known-good power adapter.
3 Try known-good, charged battery. (See Battery Verification

in Additional Procedures.)
4 Connect power adapter and restart computer in 3–4 minutes.
5 Replace logic board.

Troubleshooting Symptom Charts/Power - 5

Screen is blank;
computer doesn't
respond

1 If sleep LED is continually on, backup battery power has been

interrupted. Restart computer by holding down reset actuator

10-20 seconds. If computer doesn’t restart, repeat 3–4

times.
2 Restart computer.
3 Disconnect power adapter, remove main battery, and restart

computer in 3-4 minutes.
4 Check power adapter cable.
5 Try known–good, charged battery. (See Battery Verification

in Additional Procedures.)
6 Try known-good power adapter.
7 Reset power manager. (See Power Manager and PRAM Reset

in Additional Procedures.)
8 Check all logic board cables and connections.
9 Replace keyboard.
10 Replace logic board.

Troubleshooting Symptom Charts/Power - 6

After you remove
battery, some Control
Panel settings are
different

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

1 Check keyboard and backup battery cables and connections.
2 Replace backup battery.
3 Replace logic board.

1 Reset power manager. (See Power Manager and PRAM Reset

in Additional Procedures.)
2 Reseat main battery to make sure battery is mating with

contacts on logic board.
3 Try known-good battery. (See Battery Verification in

Additional Procedures.)
4 Try known-good power adapter.
5 Replace logic board.

Troubleshooting Symptom Charts/Power - 7

Power adapter is
plugged in, but
Control Strip doesn’t
indicate adapter is
connected

When Shutdown is
selected with power
adapter plugged in,
computer shuts down
but immediately
powers back up

1 Verify that power adapter is connected correctly.
2 Try known-good power adapter.
3 Replace logic board.

1 Reset PRAM. (See Power Manager and PRAM Reset in

Additional Procedures.)
2 Disconnect power adapter, remove main battery, disconnect

backup battery, and wait 15 minutes before retesting.

Troubleshooting Symptom Charts/Power - 8

Low-power warning
appears

1 Attach power adapter and recharge battery.
2 Disconnect peripherals. If warning disappears when

peripherals are disconnected, verify that peripherals are

low-power.
3 Reduce use of floppy or hard drive, sound, backlight, or other

power-consuming devices, or reconnect power adapter.
4 Try known-good, charged battery. (See Battery Verification

in Additional Procedures.)
5 Try known-good power adapter.
6 Replace logic board.

Troubleshooting Symptom Charts/Video - 9

Video

Note:

A certain number of defects are inherent in display
technology and vary by many factors, including type of technology.
If you suspect that your display contains an abnormal number of
defects, call Apple Technical Support.

Partial or full row of
pixels is always on or
never comes on in an
active matrix display

Display is very light
or totally white

1 Check display and backlight cables and connections.
2 Replace display.
3 Replace logic board.

1 Adjust screen contrast and brightness settings.
2 Verify cable, inverter board, and logic board connections.
3 Replace inverter board.
4 Replace display.
5 Replace logic board.

Troubleshooting Symptom Charts/Video - 10

Display stopped
working or dimmed
but is fine now

Backlight doesn't
operate

No display, but
computer appears to
operate correctly

1 PowerBook 1400cs: If temperature is under 0° C or over

50° C, this reaction is normal. Let screen warm up for 30
minutes. If symptom persists, replace display.

2 PowerBook 1400c: Replace display.

1 Adjust screen contrast and brightness settings.
2 Verify that backlight cable connection is secure.
3 Check cable, inverter board, and logic board connections.
4 Verify that cables are not pinched or severed.
5 Replace inverter board.
6 Replace display.
7 Replace logic board.

Note:

If the sleep light is blinking and the computer is not in
sleep mode, reset the power manager.

Troubleshooting Symptom Charts/Video - 11

1 Insert a disk into the floppy drive and press Command–E (to

eject a disk) to verify that computer is working.
2 Adjust screen contrast and brightness settings.
3 Verify display cable, inverter board, trackpad, keyboard, and

logic board connections.
4 Connect power adapter.
5 Replace inverter board.
6 Replace display.
7 Replace logic board.

Troubleshooting Symptom Charts/Video - 12

Thin white line is
always on at middle of
screen

An external monitor
connected to the
PowerBook shows no
video

1 PowerBook 1400cs:Thin white line is normal.
2 PowerBook 1400c: Change the desktop pattern; if the line

remains, replace display.

1 Verify cable and cable connections between monitor and video

board.
2 Reseat video board and retest.
3 Replace video board.

Troubleshooting Symptom Charts/Video - 13

An external monitor
connected to the
PowerBook shows
either horizontal or
vertical rolling, or
horizontal or vertical
distortion

1 Verify monitor using another computer.
2 Replace video board.

Troubleshooting Symptom Charts/Sound - 14

Sound

No sound from
speaker

1 Verify that volume setting in Control Panel is above 0.
2 Verify that no external speaker is plugged in.
3 Verify speaker cable is seated on logic board.
4 Replace speaker.
5 Replace logic board

.

Troubleshooting Symptom Charts/Floppy Drive - 15

Floppy Drive

Note:

The floppy drive cable referred to in this section is the

cable

inside

of the floppy drive case.

Audio and video
present, but floppy
drive in media bay
does not operate

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.

Troubleshooting Symptom Charts/Floppy Drive - 16

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

1 Try known-good system disk.
2 Verify that floppy disk is not locked.
3 Verify that trackpad and trackpad button are working.
4 Verify that keyboard is working.
5 Check floppy drive cable connection.
6 Replace floppy drive cable.
7 Replace floppy drive.
8 Replace logic board.

Troubleshooting Symptom Charts/Floppy Drive - 17

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

switch system on.
2 Eject disk manually by carefully inserting opened paper clip

into hole near floppy drive slot.
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 Check floppy drive cable connection.
3 Replace floppy drive cable.
4 Replace floppy drive.
5 Replace logic board.

Troubleshooting Symptom Charts/Floppy Drive - 18

Read/write/copy
error

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

Troubleshooting Symptom Charts/Hard Drive - 19

Hard Drive

Internal hard drive
does not spin up

1 Make sure power adapter is connected.
2 Disconnect external SCSI devices.
3 Check hard drive cable connection.
4 Use Hard Drive Format to reinitialize drive.
5 Replace hard drive.
6 Replace hard drive cable.
7 Replace logic board.

Troubleshooting Symptom Charts/CD-ROM Drive - 20

CD-ROM Drive

CD-ROM drive does
not accept disc

Volume control does
not operate correctly

Macintosh cannot
mount CD-ROM drive

1 Replace disc (if dirty or damaged).
2 Reinsert CD-ROM drive.
3 Replace CD-ROM drive.

1 Check Control Panel Sound setting.
2 Reinsert CD-ROM drive.

1 Reinsert CD-ROM drive.
2 Replace CD-ROM drive.

Troubleshooting Symptom Charts/CD-ROM Drive - 21

Audio and video
present, but CD-ROM
drive in media bay
does not operate

1 Try known-good CD-ROM disc.
2 Check CD-ROM drive cable connections (inside CD-ROM

case).
3 Replace CD-ROM drive cable.
4 Replace CD-ROM drive.

Troubleshooting Symptom Charts/PC Card Module (PCMCIA) - 22

PC Card Module (PCMCIA)

PC Card won't eject 1 Make sure computer is not in sleep mode.

2 Make sure PC Card slot is not blocked.
3 Insert straightened paper clip into hole next to slot.
4 Verify that PC Card is not warped or damaged in any way.
5 Replace PCMCIA eject mechanism.

PC Card is inserted
but doesn't appear on
desktop

Note:

Modem and communication cards may not appear on

desktop.

1 Try PC Card in the other slot.
2 Replace PC Card.
3 Replace PCMCIA eject mechanism.
4 Replace logic board.

Troubleshooting Symptom Charts/PC Card Module (PCMCIA) - 23

System with PC card
performs poorly or
hangs during floppy
drive operations

Note:

place of card name in PCMCIA Eject control panel, card is damaged
or computer does not have software required to support it. Eject
card.

Replace logic board.

If “defective card” or “unrecognizable card” appears in

Troubleshooting Symptom Charts/Infrared Communication - 24

Infrared Communication

Infrared
communication is not
working

1 Clean infrared window with soft lint-free cloth.
2 Verify infrared board is properly seated.
3 Verify infrared signal is being received by host computer.
4 Replace PCMCIA eject mechanism

Troubleshooting Symptom Charts/Peripherals - 25

Peripherals

After you connect
external SCSI device,
computer does not
boot

1 Verify that device and SCSI chain are terminated correctly.
2 Switch on external SCSI device before starting computer.
3 Check cable connections.
4 Try known-good SCSI cable.
5 Verify that SCSI ID select switch setting on external device is

unique.
6 Try known-good external SCSI device.
7 Replace logic board.

Troubleshooting Symptom Charts/Peripherals - 26

Cursor does not move
when you are using
trackpad

1 Shut down computer, unplug adapter, and remove battery. Let

computer sit for 1 minute before restarting.
2 Reset power manager. (See Power Manager and PRAM Reset

in Additional Procedures.)
3 Check trackpad connections.
4 Check keyboard and logic board connections.
5 Connect low-power mouse and try to move cursor. If cursor

moves, try using trackpad and keyboard. If trackpad does not

move cursor, replace trackpad. If keyboard does not respond,

replace keyboard.
6 Replace logic board.

Troubleshooting Symptom Charts/Peripherals - 27

Cursor intermittently
does not move or
moves erratically

Note:

User must touch trackpad with the surface of only one

finger at a time and point directly down on the trackpad surface.

1 Clean trackpad surface (with computer off, using a non-

static inducing material).
2 Check trackpad connections.
3 Replace trackpad.
4 Replace keyboard.
5 Replace logic board.

Troubleshooting Symptom Charts/Peripherals - 28

Cursor moves, but
clicking trackpad
button has no effect

1 Reset power manager. (See Power Manager and PRAM Reset

in Additional Procedures.)
2 Check trackpad connections.
3 Check keyboard and logic board connections.
4 Replace trackpad.
5 Replace trackpad cable
6 Replace keyboard.
7 Replace logic board.

Troubleshooting Symptom Charts/Peripherals - 29

Cursor does not move
when you are using
mouse

No response to any
key on keyboard

1 Check mouse connection to ADB port.
2 Try a known-good low-power mouse. If the known-good

mouse works, clean mouse ball and inside of original mouse

and retest. If the original mouse still doesn’t work, replace

it.
3 Replace logic board.

1 Verify that computer is on.
2 Reset the power manager. (See Power Manager and PRAM

Reset in Additional Procedures.)
3 Check keyboard connection by disconnecting and reconnecting

keyboard cables.
4 Replace keyboard.
5 Replace logic board.

Troubleshooting Symptom Charts/Peripherals - 30

Known-good direct­connect printer does
not print

Known-good network
printer does not print

1 Reset PRAM. (See Power Manager and PRAM Reset in

Additional Procedures.)
2 Verify that Chooser and Control Panel settings are correct.
3 Check cables.
4 Replace printer cable.
5 Try known-good printer.
6 Replace logic board.

1 Reset PRAM. (See Power Manager and PRAM Reset in

Additional Procedures.)
2 Verify that Chooser and Control Panel settings are correct.
3 Check cables.
4 Attach computer directly to printer, and retest.
5 Replace logic board.

Troubleshooting Symptom Charts/Peripherals - 31

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

In disk mode,
computer does not
display SCSI icon
until host is booted,
or computer crashes
when host is shut
down

1 Reset PRAM. (See Power Manager and PRAM Reset in

Additional Procedures.)
2 Check cables.
3 Verify that SCSI device is correctly terminated.
4 Verify that SCSI select switch setting on external device is

unique.
5 Test device with known-good computer.
6 Replace logic board.

1 Verify that computer has a unique SCSI ID.
2 Check that SCSI disk mode cable is good and that connection is

tight.
3 Replace logic board.

Troubleshooting Symptom Charts/Miscellaneous - 32

Miscellaneous

Sleep light won’t
come on

Screen goes blank and
computer shuts down
every few minutes

Application seems to
run slower after a few
seconds

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

1 Verify that computer is in sleep mode and not powered off.
2 Reset power manager. (See Power Manager and PRAM Reset

in Additional Procedures.)
3 Replace inverter board.

Computer is going into system sleep to conserve battery power.
Adjust sleep delays in Control Panel or connect power adapter.

Computer is switching to system rest. If system rest is
interfering with operation of application, connect power
adapter.

Adjust sleep delays in Control Panel or connect power adapter.

Troubleshooting Troubleshooting Flowchart—Startup Problems - 33

Troubleshooting Flowchart—Startup Problems

START

Reset the

Power Manager.

Press power button to
begin boot sequence.

Do you

hear the

startup
tones?

Yes

Are the 

startup tones

normal?

Yes

Does a
gray screen
appear with

pointer?

Yes

1

No

No

No

Does any 

video

appear?

Yes

1. Check the volume.

2. Check the keyboard and 
display cables.

3. Replace the speaker.

4. Replace the logic board.

See "Startup" in the 
Symptom Charts.

1. Check display/inverter cable 
connections.

2. Replace the display and 
backlight cables.

3. Replace the inverter.

4. Replace the display.

5. Replace the logic board.

1. Check the keyboard and 

No

display cables.

2. Replace the keyboard.

3. Replace the logic board.

Troubleshooting Troubleshooting Flowchart—Startup Problems - 34

Troubleshooting Flowchart—Startup Problems

1

Does

the

PowerBook continue

to boot to the

desktop?

Yes

Do the

trackpad and

keyboard
function?

Yes

Insert a known-good disk

into the floppy disk drive

and try to initialize it.

No

No

Does

the flashing

question mark

appear?

Yes

1. Reset PRAM.

2. Boot from

3. If hard drive appears, reinstall system software.

4. If hard drive doesn't appear, see if

Format

5. Replace the hard drive cable.

6. Replace the hard drive.

7. Replace the logic board.

1. Reset PRAM.

2. Check the trackpad and
keyboard cables.

3. Replace the trackpad and
keyboard cables.

4. Replace the trackpad.

5. Replace the keyboard.

6. Replace the logic board.

Disk Tools

can reformat it.

1. Boot with extensions off.

2. Boot with

No

Update Driver

3. Replace the hard drive.

4. Replace the logic board.

.

Go to

Start

Disk Tools

.

Hard Drive

Does the

disk

initialize?

Yes

Does the
CD-ROM

drive mount?

Yes

END

No

1. Replace the floppy drive cable.

2. Replace the floppy drive.

1. Reinsert the CD-ROM drive.

No

2. Replace the CD-ROM board.

3. Replace the CD-ROM drive.

K

Service Source

T ak e Apart

PowerBook 1400 Series

Take Apart - 1

Screw Information

There are 16 types of screws in the PowerBook 1400. The
chart and information that follows will help you ensure that
the correct screws are used in putting the computer back
together.

Caution:

phillips screwdriver when removing or installing phillips
screws.

To avoid stripping any screw heads, use a metric

Troubleshooting - 2

Pictured Screws

For a visual of the screws (identified by the letters A-W) in their locations, refer to the
pages that follow.

Take Apart - 3

Keyboard & Heatsink

Take Apart - 4

Hard Drive

Take Apart - 5

Top Case

Take Apart - 6

Trackpad

Take Apart - 7

Backup Battery

Take Apart - 8

Speaker

Take Apart - 9

CD-ROM Drive Assembly

Take Apart - 10

Floppy Drive Assembly

Take Apart - 11

Microprocessor Daughterboard

Take Apart - 12

Feet

Take Apart - 13

Logic Board