Why does my ps3 home screen not show up on my PC monitor

I remembered the keystrokes to enter the game and it worked fine, except that I have no internet, as I haven't set it up yet. It seems that everything relating to a home screen shows up as "Input not supported". I also reset the video settings by holding down the power button and it worked until I had to select whether to use the HDMI output. It turned off immediately whether I pushed yes, no, or cancel. I would be happy even with the button combination to set up a wired connection, as I have both wired and wireless available.