Ok so I'm having some trouble diagnosing a problem with my PC is, so I was on my computer and then a strange burning smell emerges from my PC and then it just shuts off as if the power had been turned off. So I try and turn the computer on but it's not responsive when I press the power button. So I open the case and switch the PSU switch on and off and press the power button and the power button shows it's blue light and the fan on the CPU's heat sync turns and then stops along with the light on the power button. Also when I turn the switch on the PSU the light on the motherboard lights up but when the power button is pressed it turns off alongside with the blue light and fan so what has happened here is it my CPU being burnt as the computer looks pretty intact but only that fan spins for a second and the blue light but nothing else so does anyone know what this could be?