My pc stopped working,

[Orian Pax]

It's been a while since I came here, idk if I am posting in the right subforum.

Still here goes,

 

Processor - i5-6500

Mobo - asus h170pro 

Ram - new corsair 3200mhz 8gb stick, 16gb stick ( both kept at default 2133mhz )

 

- one day my pc started turning off on its own.

With ram reseating it worked for few hours and then later it never post the best I could do was to get in the bios before everything went blank again....

 

- so next day I cleaned yeah i didn't clean it for 5-6 months

( If it works I don't wanna touch it )

- I used blower of 450w ( gently )

And now this is the situation,

Cpu fan works,

No light in keyboard and mouse,

Nothing comes in screen ( not even black screen )

- monitor works 

I got new psu from Amazon 

Still the same

 

What could be the issue?

Which part do you think might have stopped working?

Plz I need help