LG LA643x Owner's Manual page 124

ꕢ Digital broadcasting is not available even though the cable is connected.
• Check with the cable operator providing your subscription and/or signal. (Depending
on your subscription, digital broadcasting may not be supported.)
ꕢ The display is inactive or unclear when connected to an HDMIⓇ source.
• Check the HDMIⓇ cable specifications. If your HDMIⓇ cable is not genuine, images
may fade in and out or not be displayed properly.
• Ensure that all cables are securely connected. When connections are not secure,
images may not be properly displayed.
ꕢ Does not work with a USB storage device.
• Verify that the USB device and cable is version 2.0 or higher.