[SOLVED] Booting Problem

Hey guys, I am having a bit of trouble booting up my computer

So basically yesterday, I left my computer idle and then all of a sudden it restarted (No programs were running). Now when I try to turn on my computer, The CPU/GPU (I have an APU) fan spins extremely fast, but the power doesn't light up nor the computer turns on 9/10 times. BUT when it does turn on on the 1/10 attempt, The computer, so far works completely fine. Can someone tell me what's going on? I was playing a CPU demanding game (GTA IV) yesterday but other than my CPU reaching 55C, everything else was fine. The problem happened when I exited it and left it idle? Is one of my hardware parts dying out (Possibly PSU/APU?)

Here's my specifications:
Motherboard: AX3470 Motherboard (Acer)
PSU: 220W (Don't know the brand)
HDD: 1TB
APU: AMD A6 3620 at 2.20GHZ with integrated HD 6530d
RAM: 2x 2048MB DDR3 Ram cards

Thanks