Mirroring laptop screen to TV using a USB to HDMI cable My laptop doesn’t have an hdmi port, so I got a USB to HDMI cable hoping to mirror my laptop screen onto the TV. Now, the cable is plugged into the TV and into the laptop. I can tell the TV recognizes something because in the input menu, the HDMI icon is in color. However, the TV screen is still black and says no signal. I tried changing my laptop screen resolution but still no luck. How can I get my laptop screen to appear on my TV? 
Thanks in advance! 