Monitor Troubleshooting

The screen is blank
Is the product's power cord connected correctly?
  • Check if the power cord is connected correctly to a wall outlet.
Is the power lamp on?
  • Check the Power button.
Is the power on and the power lamp is lit either blue or green?
  • Adjust the screen brightness and contrast.
Is the power lamp blinking?
  • The power lamp blinks when the Internet Monitor is in standby mode. When you press the power button, the monitor turns on again within 2 to 3 seconds. Using a keyboard or mouse does not exit standby mode.
Do you see the Monitor Frequency Range Exceeded message on the screen?
  • This occurs when the signal sent by the PC (video card) exceeds the range of horizontal or vertical frequency supported by the monitor, so check the Product Specifications of this manual and change the settings.

Do you see the Check Signal Cable Connection message on the screen?
  • This occurs when the signal cable between the PC and the monitor is not correctly connected or unplugged, so check and reconnect the signal cable.
There are afterimages on the screen
Are there afterimages on the screen even after turning the monitor off?
  • Please be careful as displaying a fixed image on the screen for a prolonged period of time can damage the monitor and leave afterimages on the screen. Use screen savers to extend your monitor's working life.
TIP
Vertical Frequency
  • A monitor screen must be refreshed dozens of times every second like a fluorescent lamp to allow users to see the picture.
  • This rate of screen refresh is called the Vertical Frequency or Refresh Rate, and is measured in Hz.
Horizontal Frequency
  • The time taken to display the full length of a single horizontal line on the screen is called the horizontal cycle.
    The Horizontal Frequency, measured in kHz, is the inverse of the horizontal cycle and shows the number of horizontal lines displayed on the screen every second.
The screen is unstable and shakes. / The screen shows ghost images.
Did you set the correct screen resolution?
  • Refer to Using the Monitor > Setting the Resolution and set the screen to the recommended resolution.
TIP
  • Check if the video card resolution or frequency is set within the range usable by the monitor, and go to Control Panel -> Display -> Settings to change the resolution to the recommended resolution (optimum resolution).
  • Set the resolution to the recommended resolution (optimum resolution) to prevent the occurrences of text smearing, screen blurring, screen truncation or screen slanting.
  • The setting procedures may vary depending on the PC and O/S (operating system), and the recommended resolution may not be supported by some video cards. In such cases, please consult the PC or video card manufacturer.
The screen color is strange
Is the screen displayed in 16 colors?
  • Change the color to 24 bit (True Color) or higher. In Windows, select Control Panel -> Display -> Settings -> Color Quality.
Does the screen color seem unstable or look monochromatic?
  • Check the connection of signal cable and connect it properly. Or, pull out and insert the video card in the PC again.

Are there spots on the screen?
  • The screen may display a few pixel spots (red, green, blue, white and black) during operation. This is caused by the inherent characteristics of LCD panels. This is not a fault and unrelated to the monitor's performance.
After connecting the monitor, the Unknown Monitor is displayed on the screen
Have you installed the device driver for the monitor?
  • Visit the homepage of LG Electronics (http://www.lg.com) to download and install the driver.
    Check the user's manual for the video card and see if it fully supports the Plug and Play function.