LG 20MK4 Series Посібник користувача - Сторінка 18

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LG 20MK4 Series Посібник користувача
18

TROUBLESHOOTING

Check the following before calling for service.
No image appears
Is the power cord of the display
connected?
Do you see an "Out of Range"
message on the screen?
Do you see a "NO SIGNAL" message
on the screen or black screen?
Can 't you control some functions in OSD?
Can't you select some menu in
OSD?
CAUTION
Check Control Panel ► Display ► Settings and see if the frequency or the resolution were changed. If yes, readjust the
y
video card to the recommend resolution.
If the recommended resolution (optimal resolution) is not selected, letters may be blurred and the screen may be dimmed,
y
truncated or biased. Make sure to select the recommend resolution.
The setting method can differ by computer and O/S (Operation System), and resolution mentioned above may
y
not be supported by the video card performance. In this case, please ask to the computer or the video card
manufacturer.
Keep proper posture when using the monitor, otherwise the screen may not be optimized.
y
Display image is incorrect
The screen color is mono or abnormal.
The screen blinks.
Do you see an "Unrecognized monitor, Plug&Play (VESA DDC) monitor found" message?
Have you installed the display driver?
y Check and see if the power cord is connected properly to the power outlet.
y This message appears when the signal from the PC (video card) is out of horizontal
or vertical frequency range of the display. See the 'Specifications' section of this
manual and configure your display again.
y After the monitor is on "NO SIGNAL", the monitor goes to DPM mode.
y This is displayed when the signal cable between the PC and the monitor is
missing or disconnected. Check the cable and reconnect it.
y Check PC status.
y You can unlock the OSD controls at any time by entering the OSD lock menu and
changing items to off.
y Check if the signal cable is properly connected and use a screwdriver to fasten if
necessary.
y Make sure the video card is properly inserted in the slot.
y Set the color setting higher than 24 bits (true color) at Control Panel ► Settings.
y Check if the screen is set to interlace mode and if yes, change it to the recommend
resolution.
y Be sure to install the display driver from the display driver CD (or diskette)
that comes with your display. Or, you can also download the driver from our
website: http://www.lg.com.
y Make sure to check if the video card supports Plug&Play function.