This morning my phone was working just fine. I went to send a text, and my screen was totally black with a few little fuzzy rainbow lines in the middle of it. It wasn't dropped, I haven't downloaded anything new. I've tried pulling out the battery, restarting, nothing works. When my phone turns on, I can hear texts being received, but I can't check them. After one time trying to pull out the battery, my phone started doing this crazy ring thing, and it didn't stop until I took the batt out again......Help??