While playing skyrim pc just shut down without any reason, temps was in range (cpu and gpu), after it shut down i tried to power it up but nothing happens, then i removed all the peripheral connected to it and tried to power it up, power supply fan is working but not the motherboard and other things connected to it, then after 5 minutes i gave another go and then boom it suddenly comes back to life,,,,, rare anyone knows why does it happened? thanks in advance.