If you want to use your PlayStation 4 as a monitor for your computer, there are a few things you need to do. First, make sure that your PS4 is connected to the internet and has the latest firmware installed. Then, open the “System Settings” menu on your PS4 and select “Display.” Under “Screen Mode,” select “Portrait.” Finally, connect your computer’s monitor to the HDMI port on your PS4 and press the power button on both devices to start the connection. ..