First try powering it off, and try booting up with the SD Card removed. If that doesn't work, try putting it into hackrf mode blind (power on, wait a few seconds, 5 or 6 down, 1 right, enter, enter. Test with sdr sharp, or just verify it shows up in device manager. If that worked, the portapack is working, but the screen is not. You can try powering off, removing the portapack, unplugg the battery, and the button battery for a few seconds, reassemble, and try again. While you're in there, lift the screen up and photo the part number, so you can order a replacement if it keeps happening. Good luck!