G 5 shut is self off and I can't restart it
I have a G 5, I am not sure what OS. Yesterday it started up just fine, but after about 3 minutes is shut itself off. I can't restart it. The power in my apartment building was off the day before. The computer was pluged into a surge pertector. When I push the button to start it, I hear the normal click and see a red light flash on and off inside the tower, but it wont turn on. was wondering how to get it started again.