My nexus 7 2012 was running fine one day with ubuntu 13.04 on it until I installed the cheese webcam booth and when it finished installing the tablet froze then shut off. I tried to turn it back on and the backlight came on but the screen won't display anything not even the Google logo or the bootloader. I plugged it in and it was detected in fastboot and I tried manually reflashing with android and ubuntu but nothing happens. I see some faint gray bars on the left side of the screen when I turn it on but no actual picture. Please help I hope I didn't permanently brick my tablet.