IBM ThinkPad 380Z Owner's manual

S10L-9624-00
IBM Mobile Systems
Hardware Maintenance Manual
ThinkPad 380Z (2635) Computer
August 1998

Note
Before using this information and the product it
supports, be sure to read the general information
under “Notices” on page 100.
First Edition (August 1998)
The following paragraph does not apply to the United
Kingdom or any country where such provisions are
inconsistent with local law:
INTERNATIONAL BUSINESS MACHINES
CORPORATION PROVIDES THIS PUBLICATION “AS IS”
WITHOUT ANY WARRANTY OF ANY KIND, EITHER
EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED
TO, THE LIMITED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE. Some states do not allow disclaimer or
express or implied warranties in certain transactions;
therefore, this statement may not apply to you.
This publication could include technical inaccuracies or
typographical errors. Changes are periodically made to
the information herein; these changes will be incorporated
in new editions of the publication. IBM may make
improvements or changes to the products or the programs
described in this publication at any time.
It is possible that this publication may contain references
to, or information about, IBM products (machines and
programs), programming, or services that are not
announced in your country. Such references or
information must not be construed to mean that IBM
intends to announce such IBM products, programming, or
services in your country.
Requests for technical information about IBM products
should be made to your IBM authorized dealer or your IBM
marketing representative.
Copyright International Business Machines
Corporation 1998. All rights reserved. Note to U.S.
Government Users – Documentation related to restricted
rights – Use, duplication, or disclosure is subject to
restrictions set forth in GSA ADP Schedule Contract with
IBM Corp.

ThinkPad 380Z
Read This First .................. 3
Screw Tightening Information .......... 4
Product Overview . . . . . . . . . . . . . . . . . 8
Checkout Guide . . . . . . . . . . . . . . . . . 9
Audio Checkout . . . . . . . . . . . . . . . . 10
Diskette Drive Checkout ............ 10
Fan Checkout . . . . . . . . . . . . . . . . . 11
Keyboard or Auxiliary Input Device Checkout . . 11
Memory Checkout . . . . . . . . . . . . . . . 12
Power Systems Checkout ........... 13
Status Indicator Checkout ........... 16
System Board and CPU Card Checkout ..... 16
TrackPoint Checkout . . . . . . . . . . . . . . 16
Optional Device Checkout ............. 18
Port Replicator Checkout ............ 18
External Monitor Self-Test ........... 18
Power Management Features ........... 20
Standby Mode . . . . . . . . . . . . . . . . . 20
Suspend Mode . . . . . . . . . . . . . . . . 20
Hibernation Mode . . . . . . . . . . . . . . . 21
Port Replicator Power Overload ........ 22
Symptom-to-FRU Index . . . . . . . . . . . . . . 23
Numeric Error Codes .............. 23
Beep Symptoms . . . . . . . . . . . . . . . . 28
Function-Related Symptoms . . . . . . . . . . 29
Indicator-Related Symptoms . . . . . . . . . . 29
Infrared-Related Symptoms . . . . . . . . . . . 29
Keyboard- or TrackPoint-Related Symptoms . . . 30
LCD-Related Symptoms . . . . . . . . . . . . 30
Peripheral-Device-Related Symptoms . . . . . . 31
Power-Related Symptoms . . . . . . . . . . . 31
Other Symptoms . . . . . . . . . . . . . . . . 32
Intermittent Problems . . . . . . . . . . . . . 32
Undetermined Problems . . . . . . . . . . . . 32
Running the Diagnostics .............. 34
PC Card (PCMCIA) Slots Test ......... 35
Universal Serial Bus (USB) Test ........ 35
Displaying the Error Log ............ 35
Checking the Installed Devices List ....... 35
Diagnostic Error Codes ............ 36
Related Service Procedures ............ 39
Status Indicators . . . . . . . . . . . . . . . . 39
Password Combinations . . . . . . . . . . . . 40
Running a Low-Level Format .......... 40
Fn Key Combinations ............. 41
FRU Removals and Replacements ......... 42
Important Notice . . . . . . . . . . . . . . . . 42
FRU Service Procedures ............ 43
Removal Reference . . . . . . . . . . . . . . 44
1010 DIMM Card and Backup Battery ..... 45
1020 Battery Pack . . . . . . . . . . . . . . 46
Copyright IBM Corp. 1998 1

1030 Hard Disk Drive ............. 47
1040 Keyboard Unit . . . . . . . . . . . . . . 49
1050 Keyboard and Speakers ......... 52
1060 Diskette Drive Assembly or CD-ROM Drive
Assembly . . . . . . . . . . . . . . . . . . 55
1070 Diskette Drive and CD-ROM Drive .... 56
1080 LCD Unit . . . . . . . . . . . . . . . . 60
1090 Fan Assembly, CPU Card, and Thermal
Rubber . . . . . . . . . . . . . . . . . . . 63
1100 Upper Shield Case ........... 66
1110 Box Speaker and Microphone ...... 67
1120 DC/DC Card . . . . . . . . . . . . . . 69
1130 System Board and PC Card Slot ..... 71
1140 Battery Pack Latch ........... 73
2010 LCD Front Cover ............ 74
2020 LCD Inverter Card ............ 76
2030 LCD Panel . . . . . . . . . . . . . . . 77
2040 LCD Misc. Parts ............. 79
2050 LCD Cable . . . . . . . . . . . . . . . 81
3010 ThinkPad Port Replicator with Advanced
EtherJet Feature . . . . . . . . . . . . . . . 82
Locations . . . . . . . . . . . . . . . . . . . . . 84
Front View . . . . . . . . . . . . . . . . . . 84
Bottom View . . . . . . . . . . . . . . . . . . 85
Rear View . . . . . . . . . . . . . . . . . . . 86
Parts List . . . . . . . . . . . . . . . . . . . . . 87
Hard Disk Drive and CD-ROM/Diskette Drive
Assembly . . . . . . . . . . . . . . . . . . 90
LCD Assembly ................. 91
Miscellaneous and Option Parts List ...... 94
Notices . . . . . . . . . . . . . . . . . . . . . 100
Trademarks . . . . . . . . . . . . . . . . . 100
2

Read This First
Before you go to the checkout guide, be sure to read this
section.
Important Notes
Only certified trained personnel should
service the computer.
Read FRU Removal and Replacement
procedures before replacing any FRUs.
Be extremely careful during write operations
such as copying, saving, or formatting.
Drives in the computer that you are servicing
might have been rearranged or the drive start-up
sequence might have been altered. If you select
an incorrect drive, data or programs might be
overwritten.
Replace FRUs only for the correct model.
When you replace a FRU, make sure the model
of the machine and FRU part number are correct
by referring to the FRU parts list.
A FRU should not be replaced because of a
single, unreproducible failure. Single failures
can occur from a variety of reasons that have
nothing to do with a hardware problem, such as:
cosmic radiation, electrostatic discharge, or
software errors. FRU replacement should be
considered only when a recurring problem exists.
If this is suspected, clear the error log and run
the test again. Do not replace any FRUs if log
errors do not reappear.
Be careful not to replace a nondefective FRU.
ThinkPad 380Z 3

Screw Tightening Information
Loose screws can cause a reliability problem. The IBM
ThinkPad computer addresses this problem with
nylon-coated screws. Tighten screws as follows:
Plastic to plastic
Turn an additional 90 degrees after the screw head
touches the surface of the plastic part:
Logic card to plastic
Turn an additional 180 degrees after the screw head
touches the surface of the logic card:
Torque driver
If you have a torque driver, refer to the “Torque”
instruction with each step.
How to Use Error Messages: Use the error
codes displayed on the screen to diagnose failures. If
more than one error code is displayed, begin the diagnosis
with the first error code. Whatever caused the first error
code can result in false error codes being displayed. If no
error code is displayed, see if the error symptom is listed
in the “Symptom-to-FRU Index” on page 23.
Port Replicator Problems: If you suspect a
problem with the port replicator, see “Port Replicator
Checkout” on page 18.
How to Diagnose Multiple FRUs: When the
adapter or the device has more than one FRU, the error
code could be caused by any of them. Before replacing
multiple FRUs, try removing or exchanging each FRU, one
by one in the designated sequence, to see if the symptoms
change.
4

What to Do First: The service personnel must fill in
the following information in the parts exchange form or
parts return form that is attached to the returned FRU:
1. Name and phone number of service personnel
2. Date of service
3. Date when the part failed
4. Date of purchase
5. Failure symptoms, error codes appearing on the
display, and beep symptoms
6. Procedure index and page number in which the
failing FRU was detected
7. Failing FRU name and the part number
8. Machine type, model number, and serial number
9. Customer's name and address
Before checking problems with the computer, determine
whether the damage is covered under the warranty by
referring to the following:
Note for Warranty: During the warranty period, the
customer may be responsible for repair costs if the
computer damage was caused by misuse,
accident, modification, unsuitable physical or
operating environment, or improper maintenance by
the customer. The following list provides some
common items that are not covered under warranty
and some symptoms that may indicate the system
was subjected to stresses beyond normal use:
The following is not covered under the warranty:
LCD panel cracked by applying excessive force
or by being dropped
Scratched (cosmetic) parts
Cracked or broken plastic parts, broken latches,
broken pins, or broken connectors caused by
excessive force
Damage caused by liquid spilled into the system
Damage caused by improperly inserting a PC
Card or installing an incompatible card
Damage caused by foreign material in the FDD
Diskette drive damage caused by pressing the
diskette drive cover or inserting diskettes with
multiple labels
Damaged or bent diskette eject button
CD-ROM drive damage caused by shock from
excessive force, or by being dropped
Fuses blown by attaching a nonsupported device
Forgotten computer password (making the
computer unusable)
ThinkPad 380Z 5

Disabling the Power-On Password:
When Only the Power-on Password is Set.
1. Power off the computer.
2. Turn the computer upside down.
3. Loosen the memory-slot cover screw 1, and
remove the memory-slot cover 2.
4. Short the power-on password jumper pads 3.
1
3
5. Power on the computer and wait until the POST
ends. The password is cleared.
6. Reinstall the memory-slot cover, and turn the
computer right side up.
7. Verify that the password prompt does not
appear.
8. To reactivate the password, set the password
again.
The following symptoms might indicate damage
caused by nonwarranted activities:
Missing parts may be a symptom of unauthorized
service or modification.
HDD spindles can become noisy from being
subjected to excessive force or from being
dropped.
I9990303 errors can be caused by exposure to
strong magnetic fields.
6

When Both Power-on Password and Supervisor
Password are Set.
1. Power off the computer.
2. Press and hold F1; then power on the computer.
After a few seconds, the password prompt
appears.
3. Enter your supervisor password. The
Easy-Setup Main Menu appears.
4. Select Password and then Power on.A
rectangular box appears.
5. Enter your supervisor password and press the
Space bar once.
6. Press Enter twice.
7. Select Exit.
8. Select Restart on the Easy-Setup Main Menu
and wait until the POST ends.
9. Reinstall the memory-slot cover, and turn the
computer right side up.
Verify that the password prompt does not appear.
To reactivate the password, set the password again.
Reset Switch: The Reset switch resets the system
regardless of the microcode status and forces a power off.
Use this push button to power off when power is not
completely off or when the microcode is in a hung state.
ThinkPad 380Z 7

Product Overview
The following table is an overview of the system features
of the IBM ThinkPad 380Z computer.
Feature Description
Processor 2635-Hxx
Intel Pentium II 233 MHz
2635-Jxx
Intel Pentium II 300 MHz
Bus Architecture PCI Bus
Memory
(Standard) 32MB (on the system board)
Memory (Option) Maximum of 96MB.
CMOS RAM 242 bytes
LCD 2635-Hxx/Jxx
13.3-inch, 16M colors, 1024×768
pixel TFT color LCD
Diskette Drive
(Internal) 1.44 MB (3-mode), 3.5-inch
CD-ROM Drive 10×—24×
Hard Disk Drive 2635-Hxx/Jxx
4.0GB, 2.5-inch, IDE interface
I/O Port Serial
Parallel
USB
External monitor
Headphone
Microphone
Port replicator
Audio 16-bit audio
Internal speakers
Internal microphone
Mechanical volume
Infrared Transfer IrDA 1.1
PC Card One Type III
or two Type I / Type II
CardBus support
ZV card support
AC Adapter 56Watt type
8

Checkout Guide
Use the following procedure as a guide for computer
problems.
Note: The diagnostic tests are intended to test only IBM
products. Non-IBM products, prototype cards, or
modified options can give false errors and invalid
system responses.
1. Obtain the symptoms in detail.
2. Verify the symptoms by running the diagnostic test to
re-create the same error or by repeating the same
operation.
Note: To run the diagnostic test, refer to “Running
the Diagnostics” on page 34.
If the symptoms occur at irregular intervals
and cannot be re-created (and therefore
cannot be verified), go to “Symptom-to-FRU
Index” on page 23; then go to “Intermittent
Problems” on page 32.
3. Match the verified symptoms with the following table
and determine the page to go to.
Verified Symptoms Go To
Power failure. (The
power indicator does not
go on or stay on.)
“Power Systems
Checkout” on page 13.
POST does not
complete. No beeps or
error codes are
displayed.
“Symptom-to-FRU
Index” on page 23, and
then go to “No Beep
Symptoms” on page 28.
The configuration is not
the same as the
installed devices.
“Checking the Installed
Devices List” on
page 35.
POST beeps, but no
error codes are
displayed.
“Symptom-to-FRU
Index” on page 23, and
then go to “Beep
Symptoms” on page 28.
POST detected an error
and displayed numeric
error codes.
“Symptom-to-FRU
Index” on page 23, and
then go to “Numeric
Error Codes” on
page 23.
The diagnostic test
detected an error and
displayed a FRU code.
“FRU Codes” on
page 38.
ThinkPad 380Z 9

Verified Symptoms Go To
Other symptoms (such
as LCD monitor
problems).
“Symptom-to-FRU
Index” on page 23, and
then go to “Other
Symptoms” on page 32.
Audio Checkout
1. Go to the diagnostic menu by selecting Test in the
Easy-Setup menu.
2. Select Audio and run the diagnostic tests.
3. If the test detects an audio problem, replace the
system board.
Diskette Drive Checkout
This checkout is to isolate the problem to a controller,
drive, or diskette. A write-enabled, blank, formatted 2HD
diskette is required.
FDD-1 represents a diskette drive in the ThinkPad
computer.
Attention
Make sure that the diskette does not have more than
one label pasted on its surface. Inserting diskettes
with multi-layered labels into the drive can damage it.
Take the following procedure to select the test device:
1. Click on Test in the Easy-Setup menu.
2. Press Ctrl+A to enter the advanced diagnostic menu.
The ThinkPad FRU Connections window appears.
3. Click on Exit The keyboard layout appears on the
screen.
4. Click on Exit.
5. Click on FDD-1.
6. Type Y (Yes) to the question that appears on the
screen. Insert a blank diskette into the drive when
instructed.
7. Press Enter to run the diskette drive test.
a. If the controller test detects an error and FRU
code 10 appears, replace the system board.
b. If the controller test runs without any errors, the
drive read/write tests start automatically.
c. If the drive read/write test detects an error and
either FRU code 50 for FDD-1 appears, replace
the drive.
If the drive is attached to a port replicator, go to
“Port Replicator Checkout” on page 18 to isolate
the replicator. Otherwise, go on to the next step.
8. If the drive is attached through a port replicator, go to
the service manual of the port replicator to isolate the
problem.
10

9. If no error occurs when you test the formatted
diskette, suspect the diskette that the customer used
when reporting the problem.
Fan Checkout
To check the fan, listen for the fan. If you cannot hear it
running at power-on, replace the fan. If you can hear it
running but not steadily, run the diagnostic test as follows:
1. Start Easy-Setup.
2. Click on Test.
3. Press Ctrl+A to enter the advanced diagnostic mode.
The ThinkPad Connection windows appear.
4. Click on Exit. The keyboard layout appears on the
screen.
5. Click on Exit again.
6. Click on System Board then press Enter to run the
test.
Follow the instructions that appear on the screen. If
the test detects a fan problem, replace it.
Keyboard or Auxiliary Input Device
Checkout
Remove any external keyboard before testing the built-in
keyboard.
If the keyboard does not work or an unexpected character
appears, make sure that the flexible cable extending from
the keyboard is correctly seated in the connector on the
DC/DC card.
If the keyboard cable connection is correct, check the
DC/DC card.
If the tests do not detect a keyboard problem, run the
keyboard test by doing the following:
1. Go to the diagnostic menu by selecting Test in the
Easy-Setup menu.
2. Press Ctrl+A to enter to the advanced diagnostic
mode.
The ThinkPad FRU Connections window appears. (If
Ctrl+A does not work, triple-click on the icon on the
right bottom corner of the basic diagnostic window.)
3. Make sure that the keyboard connection is
Connected; then press Esc to exit the screen.
A layout of the keyboard appears on the screen.
4. Check that when each key is pressed, the key's
position on the keyboard layout on the screen
changes to a black square.
Note: When the Fn key is pressed, a black square
appears briefly.
5. Press Ctrl+Pause to end the test.
If the tests detect a keyboard problem, do the following
one at a time:
ThinkPad 380Z 11

Warning: Do not replace a nondefective FRU.
Reseat the keyboard cables.
Replace the DC/DC card.
Replace the system board.
Auxiliary Input Devices: The following auxiliary
input devices are supported:
Numeric keypad
Mouse (PS/2 compatible)
External keyboard (with keyboard/mouse cable)
If any of these devices do not work, reseat the cable
connector and repeat the failing operation.
If the problem remains, replace the device, and then the
system board.
Memory Checkout
DIMMs are available for increasing memory capacity.
Memory errors may cause error messages to appear on
the screen or may hang the operating system.
Take the following procedure to isolate memory problems:
1. Turn off the computer and remove any installed DIMM
from the slot.
2. Press and hold the F1 key; then turn on the
computer. Hold the F1 key down until the
Easy-Setup menu appears.
3. Select Test and press Enter.
4. Select Memory and press Enter to run the memory
test for the base memory. If an error appears,
replace the system board.
5. Turn off the computer and reinstall the DIMM; then
turn on the computer. Verify the memory size; then
test the memory. If an error message appears,
replace the DIMM.
If a memory problem occur intermittently, perform the loop
option test. If the test detects an error, it prints an error
log on a printer connected to the parallel port. See
“Displaying the Error Log” on page 35 for more
information.
Flash Memory Update: System setup programs and
diagnostic tests are stored in the flash memory. A flash
memory update is required when:
A new version of the system program is installed.
DIMM Displayed Value
No DIMM installed 32192 KB
16 MB 48576 KB
32 MB 64960 KB
64 MB 97728 KB
12

A new features or options is added to the computer.
To update the flash memory, do the following:
1. Obtain an appropriate diskette containing the update.
2. Insert the System Program Service diskette into drive
A, and turn on the computer with ac power or a fully
charged battery.
3. Select Update system programs from the menu.
Power Systems Checkout
To determine whether a power systems problem is due to
the AC Adapter or the battery, do the following:
1. Remove the battery.
2. Connect the AC Adapter and check that power is
supplied.
3. Disconnect the AC Adapter and install the charged
battery; then check that power is supplied by the
battery.
If the problem is due to the AC Adapter, go to “AC
Adapter Checkout”
If the problem is due to the battery, go to “Battery
Checkout” on page 14
If the problem is not due to the AC Adapter or the
battery, go to “Backup Battery Checkout
(Nonrechargeable)” on page 15
AC Adapter Checkout: This checkout is used only
when the computer fails under ac power.
If the problem occurs only when the AC Adapter is
used with a port replicator, replace the replicator.
If the power-on indicator does not turn on, check the
power cord of the AC Adapter for conductivity and
installation.
1. Unplug the AC Adapter cable from the computer and
measure the output voltage at the cable plug. See
the following figure:
a. If the voltage persists, go to the next step.
Pin Voltage (V dc)
1+15.5 to +17.0
2 Ground
ThinkPad 380Z 13

b. If the voltage is correct, make sure the
connection between the DC/DC card and the
system board is not loose.
c. Replace the DC/DC card.
d. If the problem is not corrected, replace the
system board.
e. If the problem persists, go to “Undetermined
Problems” on page 32.
2. Unplug the AC Adapter cable from the ac power
outlet and wait 5 minutes or longer to allow the
overvoltage protection circuit to be fully discharged
and initialized.
3. Plug the AC Adapter cable into the ac power outlet.
4. Measure the output voltage of the AC Adapter.
5. If the voltage is still not correct, replace the AC
Adapter.
Note: An audible noise from the AC Adapter does not
always indicate a defect.
Battery Checkout: If the error is due to the battery,
do the following:
1. Turn off the computer.
2. Remove the battery and measure the voltage
between the battery terminals 1 (+) and 4 (−).
Note: Signal lines not used in these steps are used
for communication between the system and
the battery.
3. If the voltage is less than +11.0 V dc, the battery has
been discharged. Recharge the battery.
If the voltage is still less than +11.0 V dc after
recharging, replace the battery.
Note: The voltage of the battery could show 0 V
because of the overdischarge protection
Terminal Voltage (V dc) / Signal
1+0 to +13.5
4 Ground (−)
14

circuit. Try to trickle charge the battery by
attaching it to the computer with the AC
adapter.
4. If the voltage is more than +11.0 V dc, measure the
resistance between the battery terminals 3 and 4.
The resistance must be 4 to 30 K ohms.
If the resistance is not correct, replace the battery.
If the resistance is correct, replace the DC/DC card.
Checking Operational Charging
Note
Battery charging will not start unless the Fuel-Gauge
is below 95%. At below 95%, the battery will start
charging to 100% of its capacity. This limitation
protects the battery from overcharging and also
prolongs its life.
To check the operational charging, install a fully
discharged battery or a battery that is less than 50%
charged.
Turn on the computer while it is connected to the AC
Adapter. If the battery status indicator does not turn on,
turn off the computer, remove the battery, and let the
battery return to room temperature. Reinstall the battery,
and turn on the computer (still connected to the AC
Adapter). If the charge indicator still does not turn on,
replace the battery.
Backup Battery Checkout
(Nonrechargeable)
1. Turn off the computer and unplug the AC Adapter
from the computer.
2. Open the Mmoery-slot cover.
3. Remove the backup battery. (Refer to “1010 DIMM
Card and Backup Battery” on page 45 to remove the
battery.)
4. Measure the voltage of the backup battery connector.
ThinkPad 380Z 15

If the voltage is correct, replace the system board.
If the voltage is not correct, the backup battery has
been discharged. Replace the backup battery.
If the backup battery discharges quickly after
replacement, replace the system board.
Wire Voltage (V dc)
Red +2.5 to +3.7
Black Ground
Status Indicator Checkout
If an LED problem occurs, do the following:
1. Turn off the computer.
2. Turn on the computer.
3. All the LEDs in the indicator panel should turn on for
a moment soon after the computer is powered on.
Make sure they turn on.
If the problem persists, replace the system board.
System Board and CPU Card Checkout
The system board and the CPU card FRUs perform the
operation on the computer. Processor problems can be
caused by either FRU. Generally, the CPU card has a
lower failure rate. If a numeric code indicates the system
board or the CPU card as failing, do the following
procedure to isolate the problem:
1. Run the system board test to verify the symptom.
This test verifies both the system board and the CPU
card. If no error is detected, return to “Undetermined
Problems” on page 32.
Note: Do not touch the keyboard and the pointing
device when the system board is being tested.
This might cause unexpected errors.
2. If FRU code 10 appears, replace the system board,
but do not replace the CPU card. Transfer the CPU
card from the old system board to the new system
board.
3. If FRU code 11 appears, reseat the CPU card.
4. Rerun the test to verify the fix.
5. If FRU code 11 remains, replace the CPU card.
If this procedure does not correct the problem, go to
“Undetermined Problems” on page 32.
TrackPoint Checkout
If the TrackPoint does not work, do the following:
1. Run the ThinkPad Configration program and check if
the TrackPoint is enabled.
2. If it is not, select Enable and enable it.
3. If you still have a problem, continue to the next step.
16

Drifting Pointer
There may be cases when the pointer drifts for a
short while on the screen, this is not a hardware
problem. This movement can occur when a
slight, steady pressure is applied to the
TrackPoint. No service action needs to be taken.
4. Go to the Easy-Setup menu.
5. Move to an item with the TrackPoint.
6. Press either the left or the right click button.
7. Verify that both buttons work correctly.
8. Move to another item with the TrackPoint.
9. Press the TrackPoint (Press-to-Select).
10. Verify that the item is selected.
11. If the problem still persists, do the following one at a
time:
Warning: Do not replace a nondefective FRU.
Reseat the TrackPoint cable.
Replace the keyboard.
Replace the DC/DC card.
Replace the system board.
ThinkPad 380Z 17

Optional Device Checkout
If you suspect an optional device problem, do either of the
following:
“Port Replicator Checkout”
“External Monitor Self-Test”
Port Replicator Checkout
Do the following procedures to isolate a port replicator
problem. A port replicator attaches to the system
expansion connector on the bottom of the computer.
1. Turn off the computer.
2. Remove the failing devices from the replicator.
3. Unplug the AC adapter from the replicator, if
attached.
4. Remove the port replicator from the computer.
5. Reconnect the failing device directly to the computer.
(If another device is already connected to the
computer, remove it first.)
6. Go to the “Running the Diagnostics” on page 34 and
run the diagnostics.
7. If the advanced diagnostic device test does not find
an error, suspect a problem with the port replicator of
the system expansion bus.
8. Turn off the computer and reconnect the port
replicator.
9. Turn on the computer and run the following advanced
diagnostic tests:
Serial port test with the wrap plug installed on
the replicator
Parallel port test with the wrap plug installed on
the replicator
10. If diagnostic errors appear, replace the replicator or
diskette drive attachment unit.
If the problem remains after the replacement, replace
the system board.
11. If power problems appear only when the replicator is
used, replace the replicator.
External Monitor Self-Test
If a monitor problem occurs only when an external monitor
is connected, do the following:
Note: Before you replace a monitor:
Check that the 95XX systems support either
63XX, 85XX, or 95XX displays.
Make sure that the external monitor is
properly connected to the computer.
If the screen is rolling, replace the external monitor. If that
does not correct the problem, replace the FRUs in the
following order:
1. System board
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