Question psu issue

[LastSamurai]

Hi all

My pc won’t turn on,just out of the blue. A couple of days ago I started having issues with my Corsair Node Pro where the lights stopped working on the top and rear 120mm is it coincidence that it could be related.i tried a new plug and didnt work but it switched on now byt pressing the power button a few times,the psu fan isnt running either i have a Superflower 750w
Any help would be great

 

[PC Tailor]

What exact model Super Flower is it?
How long have you had the PSU?
Have you changed any hardware at all?
Have you been in the inside of the case at all?

 

[LastSamurai]

It’s a Superflower SF-750F14P(WH)

I got a new motherboard last week b450plus tomahawk and 16gb G.skill TridentZ 3200 that all new. Everything was fine till this morning.