IBM ValuePoint 6472, ValuePoint 6484, ValuePoint 6492, ValuePoint 6482, ValuePoint 6494 Hardware Maintenance Manual Supplement

ValuePoint

Hardware Maintenance

Manual Supplement

April 1994

Types 6472, 6482, 6484, 6492, and 6494

This package contains a supplement to the IBM
PS/ValuePoint

Hardware Maintenance Manual

(part

number 71G5388, form number S61G-1423-01).

Insert this package in the back of the manual. (Align
the pages in the manual, then press the pages into
place with your fingers.)

IBM, ValuePoint, and PS/ValuePoint are trademarks of the
International Business Machines Corporation.

 Copyright International Business Machines Corporation

1994. 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 the GSA ADP Schedule Contract with IBM Corp.

Part Number 83G7790
Form Number S83G-7790-00

Model 64XX Service Information

This supplement contains a general checkout and
diagnostic test procedure, a Symptom-to-FRU Index,
procedures for isolating problems to a FRU, a parts
catalog, system specifications, a system board layout,
exploded views, and a 64XX computer features table for
the IBM* ValuePoint* Models 6472, 6482, 6484, 6492, and

6494.
The diagnostic tests in this manual are intended to test

only

64XX ValuePoint products. Other products, prototype
cards, or modified options can give false errors and invalid
computer responses.

Important

 Use the ValuePoint Advanced Diagnostics

Diskette Type 5 for all models in this supplement.

 For systems preloaded with Windows

**

,
QAPlus/WIN** for ValuePoint is available in the
Windows environment as an additional diagnostic
aid.

 Call 1-800-772-2227 for the latest BIOS level for

the system you are servicing.

Before Replacing 64XX System Boards

For all 64XX models, the processor is a separate FRU
from the system board; the processor is not included with
the system board FRU.

If you are instructed to replace the system board, do the
following:

1. Install the processor from the old system board on the
new system board.

2. If any of the following options are on the old system
board, install them on the new system board.

 external cache memory and cache tag RAM

 memory modules

 extended video memory

3. Ensure that all the new system board jumper settings
match the old system board jumper settings.

If the new system board does not correct the problem,
reinstall the options on the old system board, reinstall the
old system board, then replace the processor.

*

Trademark of the IBM Corporation.

**

Trademark of the MicroSoft Corporation.

**

Trademark of DiagSoft Inc.

 Copyright IBM Corp. 1994 1

How to Install 64XX Processors

Install all model 64XX processors with the bevelled corner
located at the front-left corner of the processor socket.

Important

If the processor is not installed correctly, the system
board and the processor will be damaged.

How to Diagnose 64XX system boards with
486DX4 Processors

The 486DX4 processor FRU consists of the processor and
a voltage regulator. If you are instructed to replace the
system board, first check for 3.5 V dc between pin 1 and
pin 19 on the regulator board.

19

Processor

1

1. If the voltage is correct (approximately 3.5 V dc)
replace the system board.

2. If the voltage is incorrect, replace the processor FRU.

The general checkout procedure starts on the next page.

2 ValuePoint HMM - April 1994

General Checkout

001

– Power-off the computer and all external devices.
– Check all cables and power cords.
– Make sure there are no diskettes in the drives.
– Power-on all external devices.
– Power-on the computer.

Note: You can press Esc to speed through the

memory count when the system is first powered
on.

– Watch the screen for a POST error message.

DID YOU RECEIVE A POST ERROR MESSAGE?
Yes No

002

Go to Step 008.

003

IS THE ERROR 162?
Yes No

004

If you remove or install memory, a 164 error is
displayed. Follow the instructions on the screen.
Otherwise, go to “Symptom-to-FRU Index” on
page 12 in this supplement. If that does not solve
the problem, go to Step 008.

005

HAS THE CONFIGURATION BEEN INTENTIONALLY
CHANGED?
Yes No

006

Go to Step 008.

007

Press Enter to run the Configuration Utility program and
verify that the error is no longer present. If you return to
this point again, go to Step 008.

008

– Insert your diagnostics diskette.
– Press Ctrl+Alt+Del.
(Step 008 continues)

Model 64XX Service Information

3

(CONTINUED)

008 (continued)

DID THE COMPUTER BOOT FROM THE DIAGNOSTIC
DISKETTE AND DID THE IBM HARDWARE
DIAGNOSTIC LOGO SCREEN APPEAR?
Yes No

009

Go to “Symptom-to-FRU Index” on page 12 in this
supplement.

010

– Select Test the System.
– Press Enter.
– If you need to create a formatted test diskette for this

test, press Y, press Enter, then follow the instructions
on the screen.
Otherwise, press N, press Enter, then go to Step 011.

011

IS THE INSTALLED DEVICES LIST CORRECT?
Yes No

012

Press N, then press Enter. Go to “Installed Devices
List” on page 8 in this supplement. If that does not
resolve the problem, continue with Step 016 on
page 5.

013

– Press Y, then press Enter
DID THE “SYSTEM CHECKOUT” MENU APPEAR?
Yes No

014

Go to “Symptom-to-FRU Index” on page 12 in this
supplement.

015

– Run the diagnostics tests.

 If the test stops and you cannot continue, replace

the last device tested.

 If the computer has incorrect keyboard responses,

go to “Keyboard” on page 9 in the PS/ValuePoint

Hardware Maintenance Manual

.

 If the printer has incorrect responses, go to

“Printer” on page 9 in the PS/ValuePoint

Hardware

Maintenance Manual

.

 If the display has problems such as jittering, rolling,

shifting, or being out-of-focus, go to “Display” on
page 7 in this supplement.

4 ValuePoint HMM - April 1994

DID THE TESTS IDENTIFY A FAILURE?
Note: If the test stops and you cannot continue, replace

the last device tested.

Yes No

016

Check the “Symptom-to-FRU Index” on page 12 in
this supplement for any POST error or other error
symptom you might have. If your error symptom is
not listed, go to “Undetermined Problem” on page 6
in this supplement. If you cannot find a problem, it
might be intermittent:

 Check for damaged cables and connectors.
 Reseat all adapters, drives, and modules.
 Check the system unit fan for proper operation.
 Start an error log and run the tests multiple

times (see “Error Log” on page 42 in this
supplement).

017

Follow the instructions on the display. If that does not
correct the problem, go to “Symptom-to-FRU Index” on
page 12 in this supplement.

Model 64XX Service Information 5

Undetermined Problem

Check the power supply voltages (see “Power Supply” on
page 6 in the PS/ValuePoint

Hardware Maintenance

Manual

). If the voltages are correct, return here and

continue with the following steps:

1. Power-off the computer.

2. Remove or disconnect the following, one at a time:
a. Non-IBM devices

b. External devices (modem, printer, or mouse)
c. Math coprocessor
d. Any adapters
e. Riser card

f. Memory modules (see “Computer Memory” on

page 11 in this supplement).

g. Extended video memory
h. External Cache

i. External Cache tag RAM
j. Hard disk drive

k. Diskette drive

3. Power-on the computer to re-test the system.

4. Repeat steps 1 through 3 until you find the failing
device or adapter.

If all devices and adapters have been removed, and the
problem continues, replace the system board (see “Before
Replacing 64XX System Boards” on page 1 in this
supplement).

6 ValuePoint HMM - April 1994

Display

If the screen is rolling, replace the display assembly. If
that does not correct the problem, replace the system
board.

If the screen is not rolling, do the following to run the
display self-test:

Note: The following test does not work on all ValuePoint

displays. If the test does not work, but you suspect
the display, replace it. If that does not solve the
problem, reinstall the original display, then replace
the system board.

1. Power-off the computer and display.

2. Disconnect the display signal cable.

3. Power-on the display.

4. Turn the brightness and contrast controls to their
maximum setting.

5. Check for the following conditions:

 You should be able to vary the screen intensity

by adjusting the contrast and brightness controls.

 The screen should be white or light gray, with a

black margin (test margin) on the screen.
Note: The location of the test margin varies

with the type of display. The test margin
might be on the top, bottom, or one or
both sides.

If you do not see any test margin on the screen,
replace the display. If there is a test margin on the
screen, replace the system board.

Note: During the first two or three seconds after the

display is powered on, the following might
occur while the display synchronizes with the
computer.

 Unusual patterns or characters
 Static, crackling, or clicking sounds
 A “power-on hum” on larger displays

A noticeable odor might occur on new
displays or displays recently removed from
storage.

These sounds, display patterns, and odors are
normal; do not replace any parts.

If you are unable to correct the problem, go to
“Undetermined Problem” on page 6 in this
supplement.

Model 64XX Service Information

7

Installed Devices List

Follow the instructions on the screen for the installed
devices list.

Warning: A customized setup configuration (other than
default settings) might exist on the computer you are
servicing. Running the Configuration Utility program might
alter those settings. Note the current configuration settings
and verify that the settings are in place when service is
complete.

If the number of diskette drives shown in the installed
devices list is not correct

, do the following:

1. Restart the computer.

2. Run the Configuration Utility program to correct the
drive information (see “Diagnostics and Test
Information” on page 32 in this supplement).

3. Run the diagnostic tests.

If you cannot correct the drive information, replace FRUs,
in the following order, until the problem goes away:
 Diskette drive
 Diskette-drive cable
 System board

If the number of hard disk drives shown in the installed
devices list is not correct

, do the following:

1. Check the hard disk drive jumper settings (see “Hard
Disk Drive Jumper Settings” on page 44 in this
supplement).

2. Check the voltages to the hard disk drives (see
“Power Supply” on page 6 in the PS/ValuePoint

Hardware Maintenance Manual

).

3. Restart the computer and check the configuration.

 If the first drive is missing, replace the primary

drive.

 If any other drive is missing, replace that drive.
 If all drives are missing, replace the primary

drive.
If the problem remains, replace the drive cable. If
that does not fix the problem, replace the system
board.

If any other adapter or device is missing from the installed
devices list, run the Configuration Utility program (see
“Diagnostics and Test Information” on page 32 in this
supplement). Check to see if any adapter or device is set
to a conflicting address with any other adapter or device.
Also be sure that any adapter or device missing from the
list is not set to “disabled.”

Note: If the device is still missing from the list, run the

diagnostics provided with that device. Devices
missing from a model 64XX installed devices list
cannot be added to the list.

8 ValuePoint HMM - April 1994

Memory

001

– Power-off the computer.
– Insert the diagnostics diskette into drive A.
– Power-on the computer.
– Make a note of any POST errors you receive. Disregard

164 errors (memory size).

DID YOU RECEIVE A 2XX POST ERROR?
Yes No

002

DID THE COMPUTER BOOT FROM THE
DIAGNOSTIC DISKETTE AND DID THE IBM
HARDWARE DIAGNOSTIC LOGO SCREEN
APPEAR?
Yes No

003

You might have to press Esc to continue.
– Select “Test the System.” Run the memory

tests. (Use the RUN TESTS ONE TIME

option.)
– Continue with the question in Step 004.
– or –
If the computer did not boot from the
diagnostic diskette with the IBM hardware
diagnostic logo screen displayed, go to
“Symptom-to-FRU Index” on page 12 in this
supplement.

004

– Select “Test the System.” Run the memory tests.

(Use the RUN TESTS ONE TIME option.)

DID THE MEMORY TESTS FINISH WITHOUT AN
ERROR?
Yes No

005

Follow the instructions on the display. If there
are no instructions on the display, go to Step
007 on page 10 in this supplement.

006

Your computer memory is now functioning correctly.
If you suspect an intermittent problem, start an error
log (see “Error Log” on page 42 in this supplement).

Model 64XX Service Information 9

(CONTINUED)

007

Press Esc to continue.
– Select “Test the System.” Run the memory tests. (Use

the RUN TESTS ONE TIME option.) If you cannot run
the memory test or the test does not find a problem,
replace the memory modules, one at a time, until the
problem goes away. Refer to “Computer Memory” on
page 11 in this supplement. When the problem goes
away, replace the last memory module removed. If that
does not fix the problem, replace the system board.

10 ValuePoint HMM - April 1994

Computer Memory

Four 72-pin connectors are available to add memory
modules. Memory modules supported are 4MB, 8MB,
16MB, and 32MB with a maximum of 128MB. Memory
module speed supported is 70 ns.

Notes:

1. QAPlus/WIN for ValuePoint and most applications do
not recognize more than 64MB of memory.

2. A memory module must be installed in memory
module connector 1 at all times. Additional memory
modules must be installed in connector 2, then in
connector 3, then in connector 4.

3. Smaller size memory modules must be installed into
lower numbered memory module connectors. For
example, to install two 4MB memory modules with
two 8MB memory modules, the 4MB memory
modules must be installed in memory module
connectors 1 and 2 and the 8MB memory modules in
memory module connectors 3 and 4.

ValuePoint Memory Module Chart

FRU
Number

Size

and

Speed

6
3
8
1
S

6
3
8
2
S

6
3
8
4

6
3
8
4

D

P

6
0

6
3
8
7

6
4
X
X

60G2950 16-70ns X X X X X X
64F3606 8-70ns X X X X
64F3607 8-80ns X X X X
73G3233 4-70ns X X X
73G3234 8-70ns X X
73G3235 32-70ns X
92F0102 2-70ns X X X X
92F0103 2-80ns X X X X
92F0104 2-85ns X X X X
92F0105 4-70ns X X X X
92F3337 4-80ns X X X X
93F0058 1-80ns X
96F9289 4-80ns X
71G0801 32-70ns X

Model 64XX Service Information 11

Symptom-to-FRU Index

The Symptom-to-FRU Index lists error symptoms and
possible causes. The most likely cause is listed first.
Always begin with “General Checkout” on page 3 in this
supplement. This index can also be used to help you
decide which FRUs to have available when servicing a
computer. If you are unable to correct the problem using
this index, go to “Undetermined Problem” on page 5 in this
supplement.

Notes:

1. If you have both an error message and an incorrect
audio response, diagnose the error message first.

2. If you cannot run the diagnostic tests, but did receive
a POST error message, diagnose the POST error
message.

3. If you did not receive any error message, look for a
description of your error symptoms in the first part of
this index.

4. Check all power supply voltages before you replace
the system board. (See “Power Supply” on page 6 in
the PS/ValuePoint

Hardware Maintenance Manual

.)

5. Check the hard disk drive jumper settings before you
replace a hard disk drive. (See “Hard Disk Drive
Jumper Settings” on page 44 in this supplement.)

Important

1. For all 64XX models, some errors are indicated
with a series of beep codes (see “Model 64XX
Beep Code Index” on page 13 in this
supplement).

2. For all 64XX models, the processor is a separate
FRU from the system board; the processor is not
included with the system board FRU (see “Before
Replacing 64XX System Boards” on page 1 in
this supplement).

3. The 486DX4 processor FRU consists of the
processor and a voltage regulator. See “How to
Diagnose 64XX system boards with 486DX4
Processors” on page 2 in this supplement before
replacing the system board on models with this
processor installed.

12 ValuePoint HMM - April 1994

Model 64XX Beep Code Index

Important

In the following Beep Code Index, the numbers
indicate the sequence and number of beeps. For
example, a “2-3-2” error symptom (a burst of two
beeps, three beeps, then a burst of two beeps)
indicates a memory module problem. (Continue with
the Symptom-to-FRU index below for other
beep/no-beep symptoms.)

Beep Code FRU/Action
1-3-1, 1-3-2 Memory Module

System Board

1-4-4 Keyboard

System Board

2-1-1, 2-1-2 Run Setup

System Board

2-2-2 Video Card

System Board

2-3-2 Memory Module

System Board

2-4-3, 2-4-4 Run Setup

Memory Module
System Board

All other beep code
sequences

System Board

In the following index, an “X” in an error message can
represent any number.

Symptom/Error FRU/Action

No power, or fan not
running

See “Power Supply” on
page 6 in the
PS/ValuePoint

Hardware

Maintenance Manual

.

No beep during POST but
computer works correctly

System Board

No beep during POST See “Undetermined

Problem” on page 6 in
this supplement.

System Board
Memory Module
Any Adapter or Device
Riser Card
Power Cord
Power Supply

One long and two short
beeps during POST

System Board

Model 64XX Service Information 13

Symptom/Error FRU/Action

Three short beeps during
POST

See “Computer Memory”
on page 11 in this
supplement.

System Board
Continuous beep System Board
Repeating short beeps Keyboard (stuck key?)

Keyboard Cable

System Board
Changing colors Display
Intensity or color varies from

left to right of characters
and color bars

Display

System Board

Flashing cursor with an
otherwise blank display

System Board

Primary Hard Disk Drive

Hard Disk Drive Cable
Other display symptoms not

listed above (including blank
or illegible display)

See “Display” on page 7

in this supplement.

System Board

Display
Power-on indicator or hard

disk drive in-use light
not on, but computer
works correctly

Power Supply

System Board

LED Cables

Diskette drive in-use light
remains on or does not light
when drive is active

Diskette Drive

System Board

Diskette Drive Cable
The “Insert a Diskette” icon

appears with a known-good
diagnostics diskette in the
first 3.5-inch diskette drive

Diskette Drive

System Board

Diskette Drive Cable

Network Adapter
Program loads from the

hard disk with a
known-good diagnostics
diskette in the first 3.5-inch
diskette drive

Check Configuration

Utility

Diskette Drive

Diskette Drive Cable

System Board

Power Supply
A nonsystem disk or disk

error-type message
with a known-good
diagnostic diskette

Diskette Drive

System Board

Diskette Drive Cable

Cannot read a 5.25-inch
diskette

The button on the PS/VP

5.25-inch diskette drive

bezel must be pressed

after inserting a diskette.

Incorrect memory size
during POST

See “Memory” on page 9

in this supplement.

Memory Module

System Board
Printer problems See “Printer” on page 9 in

the PS/ValuePoint

Hardware Maintenance

Manual

.

14 ValuePoint HMM - April 1994

Symptom/Error FRU/Action

Serial or parallel port device
failure (system board port)

External Device Self-Test
OK?

External Device
Cable
System Board

Serial or parallel port device
failure (adapter port)

External Device Self-Test
OK?

External Device
Cable
Alternate Adapter
System Board
Riser Card

Some or all keys on the
keyboard do not work

Keyboard

Keyboard Cable
System Board

Clock Battery inaccurate Clock Battery

System Board

110 Follow screen instructions

Memory Module
System Board

161 Run Configuration Utility

Clock Battery
System Board

162

(and unable to run
diagnostics)

Diskette Drive

System Board
Diskette Drive Cable

162 Run Configuration Utility

Clock Battery
System Board

163 Time and Date Set?

Clock Battery
System Board

164 Run Configuration Utility

See “Memory” on page 9 in
this supplement.
System Board

199 See “Installed Devices

List” on page 8 in this
supplement.

1XX

(not listed above)

System Board

225 Unsupported Memory
2XX See “Memory” on page 9

in this supplement.

Memory Module
System Board

303

(with an 8603 error)

Mouse

Keyboard
Keyboard Cable
System Board

Model 64XX Service Information 15