NEC 1500M LA-1524HMW User Manual - If Trouble Occurs

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Plug the power cord into the outlet correctly.

Press the power switch.

Connect the signal cable correctly.

Release the power saving function.  (Operate

the mouse or keyboard.  For additional details

please read the operation manual of the

hardware that is used.)

Adjust the contrast, brightness and backlight

correctly.

Press the power switch one more time.

Use an on-screen function to perform the

desired settings.

Read the computer operation manual and

change the display mode to obtain the

specified mode.

When the 1024 

× 

768 mode is set, perform

the adjustment so the stripe patterns are not

conspicuous.

Change the desktop pattern in modes other

than 1024 

× 

768.

If the same screen is displayed on the

LCD display panel for a long period of time, a

phenomenon called “burn-in” may occur

where slight traces of the burned-in screen

pattern can still be observed when other

screen patterns are displayed.

Do not operate the display for approximately

one day and do not turn the power on.

Perform the necessary adjustments until the

characters displayed on the screen do not

flicker.

Lower the vertical frequency of the image

signal to set the video clock frequency to a

level below the standard level (80 MHz).

Set the Standard mode.

Check the video signal level from the computer

and adjust it in the correct direction.

Adjust the brightness, backlight and contrast.

(Refer to the computer operation manual of

the computer that is used for further details.)

Set the Standard mode.

Press the MENU key to check the Self-Test

screen.

Is either one of the numeric values for fH or

fV displayed in red?

The input signal frequency exceeds the range

of the security range of this unit.

Read the operation manual of the computer

and change the display mode.

The pilot LED does not

light.

There is no image.

The pilot LED does not

go off.

The image is too large or

too small. It is displaced

from the correct position.

Part of the screen is

missing.

The color of part of the

screen is changed.

There are vertical or

horizontal stripes in the

screen.

There is an after-image in

the screen.

Characters cannot be

seen clearly even after an

adjustment is performed.

The image is too dark.

The image scrolls

continuously.

Power cord / plug

Power switch

Signal cable

Computer (The power

saving function might have

operated.  If this

occurred, the pilot LED will

be light amber.)

Contrast, brightness and

backlight adjustment

Power switch

Is not the mode

registered?

Is the mode guaranteed?

Perform the V. FINETUNE

(Vertical stripe), H.

FINETUNE (Horizontal

stripe) adjustments (In the

1024 

× 

768 mode.)

Liquid Crystal panel

H. FINETUNE (Horizontal

stripe) adjustments

Does the video clock

frequency of the image

signal exceed the standard

level (80 MHz)?

Has the Office mode been

set?

Is the video level correctly

adjusted?

Is the brightness or

contrast adjustment turned

all the way down?

Has the Dynamic or Enter-

tainment mode been set?

SELF-TEST function

Signal cable

The outlines of text are

sharp.

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If Trouble Occurs

If problems continue even after the inspections described below are performed, always remove the

power plug and contact our dealer.

Symptom

Check

Remedy

Reference

Page

Please observe the following points to ensure safety.