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Main PCB

IC11

X2

RTC battery

2

2-1

Replace the Main PCB.

Date or Time cannot be
input.
Date and Time does not
change properly.
Date and Time are not
displayed.

Main PCB

IC5 ~ 8

IC4

3

3-1

Replace the Main PCB.

Memory count is too large
or too small.

YES

NO

Software setting
Go to No. 4-2

YES

NO

Speakers

Go to No. 4-3

4

4-1

4-2

Check software setting.

Replace the Speakers.
Does operation return to
normal?

Main PCB

IC7
IC10

4-3

Replace the Main PCB.

No Sound 
Volume does not work.

12

NO

11

Configuration

Check configuration.

5-1

5

Default configuration in
use

Main PCB

IC11

6-1

6

Interrupt controller failure

Main PCB

7-1

7

Timer failure

Go to No. 8-2

Does the system return to
normal if the expansion card
is removed?

YES

Main PCB

NO

IC11
IC4

8-1

8

Expansion card ROM
checksum error

Expansion card

Replace the expansion card.
Does operation return to
normal?

YES

Main PCB

NO

8-2

Main PCB

IC11

9-1

9

Real Time Clock failure

Error during
SETUP

Battery

Main PCB

Does resetting through
SETUP correct the problem?

Replace the battery.
Does operation return to
normal?

YES

YES

NO

RTC battery

IC11

10-1

10-2

10

Dead RTC Battery

Go to No. 10-2

NO

Configuration

Check configuration.

11-1

Configuration error

Go to No. 12-2

Were the correct settings
selected during SETUP?

YES

Go to No. 12-4

12-1

CMOS Checksum error

FDD

Replace the FDD.
Does operation return to
normal?

YES

Go to No. 12-3

NO

12-2

HDD

Replace the HDD.
Does operation return to
normal?

YES

Go to No. 12-4

NO

12-3

Error during
SETUP

Does resetting through
SETUP correct the problem?

YES

Main PCB

NO

IC11

X2

12-4

Make sure that connecting cables, connectors, Battery Pack and AC adapter are not loose or disconnected prior to testing.

15

PCI failur

Go to No. 15-2

Does the system return to
normal if the expansion card
is removed?

YES

Main PCB

NO

IC4

15-1

Expansion card

Replace the expansion card.
Does operation return to
normal?

YES

Main PCB 

NO

IC4

15-2

13

Does resetting the date/time
in SETUP correct the
problem?

13-1

Real time Clock is not
updating

Error during
SETUP

YES

Main PCB

NO

IC11

14

Replace the expansion RAM
card.
Does operation return to
normal? (Go to “NO” if not
connected.)

14-1

Memory size/data error

Expansion RAM
card

YES

Main PCB 

NO

IC4

IC5 ~ 8

1

YES

Brigntness
adjustment

1-1

Does the LCD display
properly after brightness
level is adjusted?

No picture appears on the
screen.

Brigntness
adjustment

2

2-1

Does the LCD display
properly after brightness
level is adjusted?

Display is too dark or too
bright.

LCD

Go to No. 3-2

3

3-1

Replace the LCD.
Does operation return to
normal.

Part of the screen does
not display properly.
Display quality poor.
(Fuzzy or slanted, etc.)

NO

YES

NO

Go to No. 1-2

Go to No. 2-2

CN3

Q56

LCD

2-2

Replace the LCD.
Does operation return to
normal?

2-3

Replace the Main PCB.
Does operation return to
normal?

YES

NO

YES

NO

Main PCB (CF-VDW07)

LCD cable

IC24

YES

NO

Inverter PCB

Go to No. 4-2

4

4-1

Replace the Inverter PCB.
Does operation returnt o
normal?

Backlight does not turn on.

YES

NO

Main PCB (CF-VDW07)

LCD cable

IC24

3-2

Replace the Main PCB.
Does operation return to
normal?

YES

NO

Go to No. 2-3

Main PCB 
(CF-VDW07)

YES

NO

LCD cable

YES

LCD

1-2

Replace the LCD.
Does operation return to
normal?

1-3

Replace the Main PCB.
Does operation return to
normal?

NO

Go to No. 1-3

Inverter cable

Go to No. 4-3

4-2

Replace the Inverter cable.
Does operation return to
normal?

YES

NO

Backlight
Main PCB 
(CF-VDW07)

CN3

Q56

4-3

Replace the backlight.
Does operation return to
normal?

YES

NO

5

YES

Settings

5-1

Cannot connect Wireless
LAN

Settings

5.1

1-1

No display after powering
on

An afterimage appears

Settings

Go to No. 1-1~7-1

5.2

2-1

Confirm the IP address, 
subnet mask, network type,
and SSID settings on both the
computer and the wireless
display.

Connection timeout is
displayed

NO

YES

NO

Go to No. 5.1~5.6

Go to No. 1-1~7-1

Settings

1-2

If an image is displayed for a
prolonged period of time, an
afterimage may appear.
Set the screensaver.

Has the computer or wireless
display been set to the 
power-saving mode?
To resume operation of your
computer from the condition
the power of the display is off
(for energy conservation 
purposes), touch the screen.

YES

NO

YES

NO

Settings

Go to No. 1-1~7-1

5.3

3-1

4-1

Put the wireless display close 
to the computer.

No server found is 
displayed

YES

NO

Settings

Go to No. 1-1~7-1

5.4

Confirm the password for both
the computer and the wireless
display.

Authentication failed is
displayed

YES

NO

5-1

Settings

Go to No. 1-1~7-1

5.5

Disconnect the wireless 
display during operation and
reestablish the connection.

Too many clients is 
displayed

YES

NO

6-1

Settings

Go to No. 1-1~7-1

5.6

Confirm whether the network
is working properly or not.

Illegal data received or 
Initial image receiving
timeout is displayed

YES

NO

7-1

Settings

Go to No. 1-1~7-1

5.7

Select wireless icon on the 
taskbar of the external 
display, then select 
Contiguration, and then set 
Tx Rate to Auto 1 or 2 Mb.
(CF-07)

Wireless connection is
interrupted

YES

NO

6-2

Settings

Go to No. 1-1~7-1

Restart the computer.

YES

NO

Settings

Go to No. 1-1~7-1

2-2

Confirm the operation of the
wireless LAN on the 
computer.

YES

NO

Go to No. 1-1~7-1

YES

Wireless LAN PCB
(CF-07/ CF-VDW07)

IC509
IC514

5-2

Replace the Wireless LAN
PCB

Re-setting for Wireless LAN
and Display

NO

Go to No. 5.1~5.6

Settings

Go to No. 1-1~7-1

3-2

Confirm that wireless icon is
on the taskbar.

YES

NO

Settings

Go to No. 1-1~7-1

3-3

Confirm the IP address of the 
computer that has been set 
on the wireless display.

YES

NO

Make sure that connecting cables, connectors and AC adapter are not loose or disconnected prior to testing.

1

Keyboard

1-1

Keyboard is broken.

Key top cannot be
pressed.
Key top does not spring
back after pressing.

2

2-1

Replace the keyboard and
see if inputting from the
keyboard function normally?

None of the keys function.
Certain keys do not
function.

YES

NO

Keyboard

Main PCB

3

3-1

Does the screen mode
correspond to the key entry
mode?

Input character is
displayed as grabage.

YES

Go to No. 3-2

4

Mouse does not function.
Inputs from the mouse are
not accepted properly.

4-1

Replace the mouse.
Does operation return to
normal?

YES

NO

Mouse

Main PCB

IC20

3-2

Is the keyboard setting in the
operating system correct?

NO

Operating
mistake

3-3

Replace the keyboard and
see if inputting from the
keyboard functions normally.

YES

NO

Keyboard

Main PCB

IC20

YES

Go to No. 3-3

NO

Software setting

Keyboard

YES

Replace the keyboard.
Does operation return to
normal?

Keyboard interface failure

6-1

Main PCB

NO

IC20

6

5

Go to No. 6

Is the keyboard properly
connected?

YES

Keyboard was
not connected
properly

NO

5-1

Keyboard failure