When I came back to try, the led was not red anymore but, after like 45 seconds, the machine turned off again with the same red led on the 'CPU_LED'. I started to think on the possible solutions so I left the PC there for almost 5 hours with the power supply disconnected. Basically, my PC turned off suddenly, while it was running a game - I checked the LEDs on the motherboard and the 'CPU_LED' was red, then I tried to reboot it, but the same led was still on.
I really hope that the problem I'm about to share is bound with the PSU, but I'd like to read your opinions.
