1 Adapters are available to convert DVI to HDMI or VGA to composite video. 2  You can also get an adapter cable to connect your computer's USB port to your TV's HDMI port if your laptop has no HDMI port. 3  Converters, especially analog ones, typically result in a loss of quality, so avoid them if possible. You can also get an adapter cable to connect your computer's USB port to your TV's HDMI port if your laptop has no HDMI port. 2  Converters, especially analog ones, typically result in a loss of quality, so avoid them if possible.