Question Tried to boot the pc after two weeks, it booted up normally but in a minute it shutdown and small explosion sound was heard. Please help

[rufus.ale]

Today, I turned on the pc after two weeks ,it booted up normally , but in a minute i just shutdown and a small explosion sound was heard from the CPU i donno where specifically it is. Please help ! I just replaced my PSU with a 400w normal one 4-5 months ago

 

[CountMike]

Today, I turned on the pc after two weeks ,it booted up normally , but in a minute i just shutdown and a small explosion sound was heard from the CPU i donno where specifically it is. Please help ! I just replaced my PSU with a 400w normal one 4-5 months ago

What system ?

 

[Mtop]

Describe "Normal" please, because now I'm interested in the abnormal one that you used prior?.