Troubleshooting - LG 24CK550Z Owner's Manual

trOubLESHOOtING

Check the following before calling for service.
No image appears
Is the power cord of the display connected?
Is the power indicator light on?
Is the power on and the power indicator white?
Is the power indicator flickering?
Do you see an "OuT Of RaNGE" message on the screen?
Is the No Signal message being displayed?
Do you see a "OSD LOCKED" message on the screen?
Do you see "OSD LOCKED" when you push MENu button?
Display image is incorrect
Display Position is incorrect.
On the screen background, vertical
bars or stripes are visible.
any horizontal noise appearing in any image or characters
are not clearly portrayed.
NOtE
• Vertical frequency: In order to display an image, the screen must be refreshed dozens of times per second like a fluorescent lamp. The number of times the screen is refreshed per second is called vertical frequency or refresh rate
and is represented by Hz.
• Horizontal frequency: The time it takes to display one horizontal line is called the horizontal cycle. The number of horizontal lines displayed in one second can be calculated by dividing one by the horizontal cycle. This is called
horizontal frequency and is represented by kHz.
• Check and see if the power cord is connected properly to the power outlet.
• Press the Power button.
• adjust the brightness and the contrast.
• If the display is in power saving mode, try moving the mouse or pressing any key on the keyboard to bring up the screen.
• Try to turn on the PC.
• 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.
• This is displayed when the signal cable between the PC and the monitor is missing or disconnected. Check the cable and reconnect it.
• You can secure the current control settings, so that they cannot be inadvertently changed. You can unlock the OSD controls at any time by pushing the MENu button for
several seconds: the message "OSD uNLOCKED" will appear.
• Press the autO button to automatically adjust your display image to the ideal setting.
• Press the autO button to automatically adjust your display image to the ideal setting.
• Press the autO button to automatically adjust your display image to the ideal setting.
• Check Control panel ► Display ► Settings and adjust the display to the recommended resolution or adjust the display image to the ideal setting. Set the color
setting higher than 24 bits (true color).
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