If your display remains blank, you should select the correct output mode for your display by pressing one of the following number keys on your keyboard: 1. HDMI mode - this is the default display mode. 2. HDMI safe mode - select this mode if you are using the HDMI connector and cannot see anything on screen when the Pi has booted. 3. Composite PAL mode - select either this mode or composite NTSC mode if you are using the composite RCA video connector. 4. Composite NTSC mode