PC no longer turning on after using new cables?

deardevildude · Sunday at 22:41

Hi all,

I have just installed a new cable set to my PC, its a Ryzen 7 3800x, RTX 3080, Corsair RM850x (from 2018). I have just installed the Corsair made type 4 compatible cable set (image below) which checking on the corsair website and the box says its compatible with my PSU.

Now the PC is no longer turning on at all, I didnt touch the front panel connectors and I have made sure they're all still connected correctly. There is an RGB section of my motherboard (ASUS x570-F gaming) which usually is lit up even if the PC is off and this also no longer turns on. I double checked all the connectors are seated fully but still no luck.

Anyone have any idea where to look or what to look at next? I unfortunately dont have another PSU on hand to check with.

Image of cable set (not my exact ones, just an image from online)

deardevildude · Sunday at 22:45

sx_turbo said:
Have you put the old cables back to see if they work?

Personally I'd get the multi meter out and check power going to the right places first.

But depends on what's easiest for you

Ill give the old cables a go, bit annoying though as i spent time cable managing them all

deardevildude · Sunday at 22:59

Okay, so plugged the original cables back in and same issue. So the cable kit has either killed my PSU or killed my motherboard. Thats a bummer right before christmas.

Even tried a different kettle lead in a completely different plug too.

deardevildude · Sunday at 23:06

Right, so after starting to unplug some more stuff I unplugged my USB 3.1 Type-C front connector and it seems to work again.

Guess its not all bad as I dont use the front type c much if at all

deardevildude · Sunday at 23:35

sx_turbo said:
That's a result

I know, glad I decided to try the old "unplug anything that isnt needed for a basic boot up" method before deciding to just buy a new PSU and try that. Because I was about 10 mins away from doing it

Cheers for your input as I had a full brain fart on where to go next, its very much appreciated.

deardevildude · Monday at 16:41

Well on a positive note, the PC now looks much nicer with the new cable set compared to the original cables.

Just need to get some black fans for the CPU cooler and maybe spray paint the top layer of the cooler to black it out.

deardevildude · 2024-12-24T06:52:40+0000

something daft already!! said:
I'd have given it a good clean first, before adding the cables for extra bling. It rather spoils the look. I also would have run the GPU power cables directly under the card, rather than to the right, if possible with your case and untangled them a bit. Also, the solid part of the cable combs would have been towards the back so they can't be easily seen. I spent about a couple of hours doing mine recently. I'm still not fully satisfied and will be giving them another go over at some point.

Not trying to be rude, but giving some possible pointers.

I know it does need a bit of a clean, I’m slowly doing it as a WIP as I work long hours a lot of days so I’m not always able or awake enough to do it in one go

freddie64 said:
When you swapped the 24 pin cable, maybe you dislodged the USB cable enough to cause a short.

I did look at the board connector and there’s no sign of any damage or such in the port that’s visible, I’m going to wait until the new panel arrives and give it a test from there. If it still does it then I know the motherboard is borked for the type c front