Troubleshooting
No image is displayed
Is the monitor power cord connected?
Does the power LED is turned on?
Power is on, power LED is green but the screen appears extremely dark.
Does the power LED look yellow?
Does the 'OUT OF RANGE' message appear?
Does the 'CHECK SIGNAL CABLE' message appear?
•See if the power cord is properly connected to the outlet.
•See if the power switch is turned on.
•Adjust brightness ( 
) and contrast (
) again.
•If the monitor is in power saving mode, move the mouse or press any key.
•The signal from the PC (video card) is out of the vertical or horizontal frequency range of the monitor. Adjust the frequency range by referring to the Specifications in this manual.
*Maximum resolution
•The signal cable between PC and monitor is not connected. Check the signal cable.
•Press the 'SOURCE' menu in the remote controller to check the input signal.
'Unknown Monitor' message appears when the monitor is connected.
Did you install the driver?
•Install the monitor driver, which is provided with the monitor, or download it from the web site. (http://www.lge.com)
•See if the plug&play function is supported by referring to the video card user manual.
'CONTROLS LOCKED' message appears.
The 'CONTROLS LOCKED' message
appears when pressing the Menu button.
•The control locking function prevents unintentional OSD setting change due to careless usage. To
unlock the controls, simultaneously press the Menu
button and 
button for 5 seconds. (You cannot set this function using the remote controller buttons. You can set this function in the monitor only.)
Note
*Vertical frequency: To enable the user to watch the monitor display, screen image should be changed tens of times every second like a fluorescent lamp. The vertical frequency or refresh rate is the times of image display per second. The unit is Hz.
*Horizontal frequency: The horizontal interval is the time to display one vertical line. When 1 is divided by the horizontal interval, the number of horizontal lines displayed every second can be tabulated as the horizontal frequency. The unit is kHz.
A37