. A weak signal can cause picture distortions. This is not a problem with the TV. If you are using an HDMI connection, check the audio output setting on your PC. If you are using an HDMI-to-DVI cable, a separate audio cable is required. Note that the HDMI-to-DVI connection is only supported by the HDMI (DVI) port and this port does not transmit audio. To listen to the computer sound, connect external speakers to the audio output connection of the computer.