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5-4

Test classification

Screen display test items

Contents

1

A20 GATE TEST

Address 20 line

2

CACHE ON/OFF

Cache memory on/off

3

NPU OPERAND TEST

Floating point processor function

4

RAM (Memory related) RAM STANDARD

Memory standard

5

DMA PAGE REG TEST

DMA page register

6

DMA REGISTER TEST

DAM register

7

DMAC Transfer TEST

DAM transfer test

8

PIC HALT INSTRUCTION TEST

Interrupt controller

9

PIC REGISTER TEST

Interrupt controller

10

RTC CMOS RAM TEST

Real time clock CMOS

11
12

SPEAKER TEST

Speaker

13

PIT CH0 TEST

Interrupt timer CH0

14

PIT CH1 TEST

Interrupt timer CH1

15

PIT CH2 TEST

Interrupt timer CH2

16

KEYBOARD REG TEST

Keyboard

17

PS/2 MOUSE REG

Mouse

18

SERIAL WRAP TEST

Serial loop back (jig required)

19

SERIAL ALL INTERNAL TEST

Serial port

20

PARALLEL REGISTER R/W

Parallel register

PCIC ALL TEST

PCIC

Card Bus REG

Card Bus port

USB REG

USB port

22

VGA ALL TEST

VGA

23

SVGA RAM TEST

SVGA RAM

24

VESA MODE TEST

VESA mode

25

FD WT/RD/WP TEST

FD write/read/write protection

26

HDD ALL TEST

Only HDD lead selected

27

ECP REGISTER R/W

Parallel port

28

EPP REGISTER R/W

Parallel port

29

EXT. CMOS R/W TEST

Extension CMOS R/W test

COMMUNICATION

IO
(Input-output)

CONTROL
(Control ICs on the
main board, etc.)

The table below explains the parts that may be faulty or damaged should an error message occur while performing the
various test items of the self diagnostics program.

CPU
(CPU related)

21

AUX
(Auxiliary functions)

DISK
(FDD, HDD)
UNIQUE
(Individual functions)

VIDEO
(Display related)

6-1

CN1

CN48

CN8

CN12

CN4

CN47

CN30

CN32

CN9

CN6

CN1

CN15

JK3

CN55

JK1

JK2

CN51

J1

J5

J6

CN2

CN1

CN932

CN10

CN933

CN930

CN950

(FRONT SIDE)

CN952
(REVERSE SIDE)

CN980

CN801

CN800

CN803

CN704

CN703

CN700

CN702

J1

J2

CN1

CN2

CN56

CN2

CN13

7-1

Before disassembling, be sure to make the following prepara-
tions.

• Shut down Windows and turn off the power.
• Disconnect the AC adaptor.
• Remove the optional DIMM memory card and PCMCIA card

if they are connected.

• Remove other devices if they are connected.

• Please execute writing BIOS ID when you exchange the

Main Board.

• You cannot reuse the Conductive Clothes and the heat dissi-

pating parts such as Sheet and Rubber. Use new parts.

Figure 1

1. Open the Battery Cover.
2. Remove the Battery Pack.
3. Open the HDD Cover.
4. Remove the HDD Pack.
5. Open the FDD Cover.
6. Remove the FDD Pack.

Use the MP Eject Lever.

1. Remove the four Screws<A>.
2. Release the two Tabs, and remove the HDD U Case

Ass’y and the HDD L Case Ass’y.

3. Remove the HDD Damper Ass’y.
4. Remove the two Sheets.
5. Remove the Heater and the Heater Sheet.
6. Remove the HDD FPC.

Screws <A>: DFHE5025XA

MP RELEASE

MP

Cover

Battery

Cover

HDD Cover

HDD Pack

FDD Pack

Battery Pack

HDD U Case Ass’y

HDD FPC

Heater

<A>

<A>

HDD Case 
Ass’y

Tab

Tab

HDD

HDD 
Damper
Ass’y

Heater Sheet

Sheet

Sheet

7-2

Figure 3

1. Remove the four Screws<B>, and remove the KB Cover. 
2. Remove the four Screws<C> and the four Screws<D>,

and remove Hinge Cover L,R. 

3. Remove the Keyboard.

Screws <B>: DRQT26+D4FZL
Screws <C>: DFHE5054XA
Screws <D>: DFHE5054XA

Figure 4

1. Remove the five Screws<F>, and remove the KB Cable

Cover.

2. Disconnect the two Cables from two Connectors (CN932,

CN933)

3. Remove the six Screws<G>, and remove the PCMCIA

Protector.

Screws <F>: DRHM0002ZA
Screws <G>: DRQT2+I35FKL

<B>

<B>

<D>

<D>

<D>

<D>

<C>

<C>

<C>

<C>

<B>

<B>

KB Cover

Hinge Cover L

Hinge Cover R

Keyboard

<F>

<F>

<F>

<F>

<F>

Keyboard

Connector

(CN933)

to Connector

(CN933)

KB Cable Cover

Connector

(CN932)

to Connector

(CN932)

<G>

<G>

<G>

<G>

<G>

<G>

PCMCIA 

Protector