My friend built this computer for me last year and I haven't had any problems with it. but now just this morning I go to turn it on and all it does is spark on real quick like a tiny fraction of a second. the led's turn on really fast and then immediately go off and the mouse lights up and theres a clicky sort of popping sound that comes from my headphones all this happens in about a millisecond. if I hold down the power button it repeatedly clicks at a constant rate as if you were holding a stove dial on light. I havent had any problems with this computer until now.