Asus U47A shut off - won't turn back on

I've read through the forum and tried to unplug/remove battery/hold down power button for 58 seconds - nothing is working. I have nothing on the screen at all - no fan starting up, no lights. No warning other than when I opened my computer this morning it went through a "repairing" mode - figured my kids didn't shut down / unplugged it or something but they say no. It let me log on and get on email for about 5 minutes after it repaired/rebooted and then unexpectedly shut down to nothing. Any suggestions from here?