For reasons I don’t really understand, Windows* seems to ignore the
HDMI port when you plug something in, so we’ll have to power it up and
tell the computer it’s fine to send a signal out on the line.
That’s done by going into Control Panels and selecting “Adjust screen
resolution."
On that window you’ll see that it shows there are two
different displays, but one of them will be disabled.
To remedy this, click on the second monitor, then choose “Extend the desktop onto this monitor” and click
“Apply”.
The HDTV screen should come to life and show you a Windows desktop background photograph.
If it doesn’t, try again.
Sometimes you have to select this more than once.
I recommend that you now tweak the resolution on the second screen to
be at least 1100 x 650, depending on what options you have. I have very
good luck with 1184x666.
The goal is to have the background photo spread across the entire TV
screen. Now make sure you have the sound unmuted and at a reasonable
volume on your computer and on the TV and let’s get some content on the
screen!