Okay, so I just tried to install an Android update from 4.1 to 4.3 and it errored out with that little Android dude fallen over. So I followed a tip I saw on another thread and tried to reboot it, and now my Nexus is just hanging on that multicolored flashing X screen. Won't turn off, won't reboot or anything. Could you give me some tips on how to fix this, or is it just completely jacked up?