Build Advice New PC build powers on, but display and USB-ports don't work

[zsetga14]

I have been building a gaming PC for the first time in the last few days. The parts are all new except the case, the GPU and one of two SSDs (which has Windows on it I think :/). Originally this was a PC I bought used on ebay, but I wanted to upgrade the build.
The PC does turn on when I press the power button and the three fans (CPU, GPU, case fan) are all running and a little red light comes on at the front. However, all the peripherals that I connect to the PC do not respond/do not get power. Neither my mouse, my keyboard, nor does my display receive any signal. As far as the display is concerned, I have tried three different cables in various combinations with two displays. I also connected the display to the mb, but that doesn't do anything in any case, because my CPU doesn't have an integrated GPU. So the display always detects no signal. The HDMI cable is connected to the GPU and the cables for mouse and keyboard are connected to the mainboard...
I'm quite frustrated and don't understand what the problem is. I have also switched it on and off several times or switched it on with and without peripherals. I can't rule out the possibility that I may have overlooked something during assembly, but I can't think of anything at the moment. I also see the possibility of the GPU having an issue, as it's quite old. Can anyone help me with this?
Thanks!

CPU: Intel Core i5-10400F 2.9 GHz 6-Core
MB: Asus PRIME H510M-E Micro ATX LGA 1200
Memory: G.Skill Aegis 16 GB (2 x 8 GB) DDR4-3200 CL16
Storage: Samsung 840 Evo 250 GB 2.5" SSD
Storage: Crucial MX500 1 TB 2.5"
GPU: XFX DD Radeon R9 380 4 GB
Case: Inter-Tech IM-1 POCKET MicroATX
PSU: Corsair VS550

PS: Now the case fan only tries to turn on and then stopps, when I power up the PC. I'm scared that I might have forgotten to turn off the power supply, before touching something. It could also just be that the fan is at the end of its life, as it's pretty old. I hope it's only the fan, as that wouldn't be too bad to replace, if the PC works.

Some pictures:
https://imgtr.ee/image/WhatsApp-Bild-2024-02-17-um-17.19.20-c70dcb27.IuwC3F

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Image WhatsApp Bild 2024 02 17 um 17.19.20 c4414ee6 hosted in IMGTR

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https://imgtr.ee/image/WhatsApp-Bild-2024-02-17-um-17.19.21-27e2b1bf.IuwJ5v

WhatsApp Bild 2024 02 17 um 17.19.21 16614fe3

Image WhatsApp Bild 2024 02 17 um 17.19.21 16614fe3 hosted in IMGTR

imgtr.ee

 

[Aeacus]

PSU: Corsair VS550

Crap quality PSU. Replace ASAP and cross your fingers that this terrible PSU didn't fry any other components.

For PSU, get proper, good quality unit, like: Seasonic Focus or Corsair RMi/RMx. In 650W range, since the GPU in there is 190W and 550W unit is too close for comfort.

 

[zsetga14]

Crap quality PSU. Replace ASAP and cross your fingers that this terrible PSU didn't fry any other components.

For PSU, get proper, good quality unit, like: Seasonic Focus or Corsair RMi/RMx. In 650W range, since the GPU in there is 190W and 550W unit is too close for comfort.

Ok thanks. Can that explain my issues/do my issues mean that the PSU fried the motherboard or the CPU? Or could the problem be isolated to the PSU?

 

[Aeacus]

Can that explain my issues/do my issues mean that the PSU fried the motherboard or the CPU? Or could the problem be isolated to the PSU?

Without replacing the PSU and testing with 2nd, known to work, good quality PSU, there is no telling if the PSU alone died or if the PSU took something with it when it went belly up. Hence why i said to cross your fingers and hope for the best.

Though, do note that when PSU goes belly up, it has the magical ability to fry everything it is connected to (aka your whole PC). So, at best, you can consider your PSU dead. At worst, you can consider EVERYTHING dead. Most of the times, MoBo and/or GPU also get fried when PSU blows up. And the worse the PSU build quality is - the higher the chance of PSU frying other components.

For example;
I have great quality Seasonic PRIME 650 80+ Titanium PSU [SSR-650TD] (powering my Skylake build, full specs with pics in my sig), which was the best 650W PSU money could buy back in 2016. And even today, it is one of the best (if not the best) PSUs out there. Highest efficiency there is: 80+ Titanium. Longest warranty there is: 12 years. Lowest ripple, longest hold up time, very quiet operation etc.
Now, if, (and that's a big IF), my PSU should die for whatever reason, it's top-notch build quality and protections in it, wouldn't fry any other components. Due to that i have 0 worry of my PSU killing any other of my components.
Also, my PSU has been on daily service since 2016, ~16h per day. That's ~8 years now and my PSU is still going strong.

Now, the worse the PSU build quality is - the higher the chance it killing something.
Your Corsair VS-series is bottom of the barrel, worst PSU ever made by Corsair, a crap quality PSU. In your case, i expect MoBo and even GPU to be dead as well. Maybe even CPU and RAM too. (Haven't heard of PSUs killing SSDs but it still is a risk.) With crap quality PSUs, question isn't if the PSU blows up, but when the PSU blows up.

So, i wouldn't get your hopes up in terms of what components survived.

That being said, never cheap out on PSU!
If you bought that Corsair VS-series as brand new PSU, well, now you have to pay life's tax.

 

[zsetga14]

Without replacing the PSU and testing with 2nd, known to work, good quality PSU, there is no telling if the PSU alone died or if the PSU took something with it when it went belly up. Hence why i said to cross your fingers and hope for the best.

Though, do note that when PSU goes belly up, it has the magical ability to fry everything it is connected to (aka your whole PC). So, at best, you can consider your PSU dead. At worst, you can consider EVERYTHING dead. Most of the times, MoBo and/or GPU also get fried when PSU blows up. And the worse the PSU build quality is - the higher the chance of PSU frying other components.

For example;
I have great quality Seasonic PRIME 650 80+ Titanium PSU [SSR-650TD] (powering my Skylake build, full specs with pics in my sig), which was the best 650W PSU money could buy back in 2016. And even today, it is one of the best (if not the best) PSUs out there. Highest efficiency there is: 80+ Titanium. Longest warranty there is: 12 years. Lowest ripple, longest hold up time, very quiet operation etc.
Now, if, (and that's a big IF), my PSU should die for whatever reason, it's top-notch build quality and protections in it, wouldn't fry any other components. Due to that i have 0 worry of my PSU killing any other of my components.
Also, my PSU has been on daily service since 2016, ~16h per day. That's ~8 years now and my PSU is still going strong.

Now, the worse the PSU build quality is - the higher the chance it killing something.
Your Corsair VS-series is bottom of the barrel, worst PSU ever made by Corsair, a crap quality PSU. In your case, i expect MoBo and even GPU to be dead as well. Maybe even CPU and RAM too. (Haven't heard of PSUs killing SSDs but it still is a risk.) With crap quality PSUs, question isn't if the PSU blows up, but when the PSU blows up.

So, i wouldn't get your hopes up in terms of what components survived.

That being said, never cheap out on PSU!
If you bought that Corsair VS-series as brand new PSU, well, now you have to pay life's tax.

Thanks a lot for the detailed answer! Other question: if I was to use the SSD and/or the RAM in completly different system, would it, in the scenario that they suffered from my PSU, affect the new system in some way or would it be safe to try, the worst outcome being that they simply don't work?

 

[Aeacus]

if I was to use the SSD and/or the RAM in completly different system, would it, in the scenario that they suffered from my PSU, affect the new system in some way or would it be safe to try, the worst outcome being that they simply don't work?

SSD or RAM, IF damaged, won't work. Also, won't harm 2nd system in any way either. Only component that can harm other components, is PSU.
Since PSU powers everything, it is the most important component inside the PC.

Though, IF the SSD works, data on it might be corrupt. E.g when you have Win on it, OS wouldn't be bootable anymore. Or other files on there are missing/corrupt. Something to keep in mind.