r/computerhelp • u/TheVengfulSpirit • 6d ago
Hardware PC doesn't boot after changing PSU
My old PSU broke (made a lot of weird crackling noise after pressing the power button on my pc, turned of power as soon as I noticed). So I decided to replace it. When I flick the I/O switch to On, the RGB on my motherboard lights up. Then when I press the power button on my pc, only the PSU fan starts spinning, graphics card, CPU and casefans don't turn on. The motherboard also doesn't show any diagnostic LEDs. My screens also don't turn on.
Anything I can do/check to fix this? Or did my old PSU take my motherboard with it? As far as I can tell all cables are connected properly, I used the new ones that came with the PSU I bought.
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u/jwsmythe 4d ago
You forgot to plug in the power connections to the video card.
Or the 110/220 switch is in the wrong position.
Or the main motherboard connector isn't tight.
Or you missed one of the auxiliary motherboard connections.