LG 47VT30 Owner's Manual page 50

The screen image looks abnormal.
● Is the screen position wrong?
● Do thin lines appear on the background
screen?
● Horizontal noise appears or the
characters look blurred.
● The screen is displayed abnormally.
● Nothing is displayed on the screen.
• Vertical frequency: To enable the user to watch the product display, screen image
Note
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.
Troubleshooting
• D-Sub analog signal - Press the "AUTO" button
in the remote control to automatically select the
optimal screen status that fits into the current
mode. If adjustment is not satisfactory, use the
Position OSD menu.
• See if the video card resolution and frequency
are supported by the product. If the frequency
is out of range, set to the recommended
resolution in the Control Panel "Display"
Setting menu.
• D-Sub analog signal - Press the "AUTO" button
in the remote control to automatically select an
optimal screen status that fits into the current
mode. If adjustment is not satisfactory, use the
Clock OSD menu.
• D-Sub analog signal - Press the "AUTO" button
in the remote control to automatically select an
optimal screen status that fits into the current
mode. If adjustment is not satisfactory, use the
Phase OSD menu.
• The proper input signal is not connected to the
signal port. Connect the signal cable that
matches with the source input signal.
• Check if the power is turned on.
• Check the network connection
- If your network connection is unstable, the
power may be turned off.
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