PC Crashing to Black Screen Randomly and on Boot

thescouselander · Monday at 18:02

I've been having a problem with my desktop PC that seems to be getting worse. It started with random crashing to a black screen (no signal detected) and recently it's started happening at boot. The confusing thing is there's no errors in the windows logs and the ASUS motherboard displays random LED colours on the crash. The crash also happens when in the BIOS and the green LED is lit when that happens.

MemTest86 hasn't found any errors and when the PC boots I can game for many hours without issue. I've reseated everything including the ram, GPU and CPU.

Has anyone got any ideas as to what's going on here? I'm starting to wonder about the PSU but not sure how best to confirm that.

tamzzy · Monday at 19:06

Full computer specs?

thescouselander · Monday at 19:17

It's this one

OcUK Gaming Katana - Intel i7 14700KF GeForce RTX 4070 Ti Super Gaming PC | OcUK

Order now online and benefit from fast delivery.

www.overclockers.co.uk

ED209 · 2025-01-28T08:02:19+0000

Have you tried a different HDMI\DP cable and tried a different port on the GPU?

If its a pre built system from OCUK and still has warranty have you tried calling their support?

Do not want to do anything that may void your warranty

freddie64 · 2025-01-28T08:18:54+0000

thescouselander said:
I'm starting to wonder about the PSU but not sure how best to confirm that.

What PSU is in the system?

You really should contact OCUK about this though.

thescouselander · 2025-01-28T09:53:36+0000

freddie64 said:
What PSU is in the system?

You really should contact OCUK about this though.

Yes, I'll contact OC but I want to make sure I've done as much trouble shooting as possible before giving up and sending it to them.

The PSU is a 1000w Kolink Regulator gold.

Last night I discovered the EFI System partition was corrupted so I rebuilt that and now the system boots faster but I haven't had time to test it all properly. I also now have a new problem that the setting in the BIOS that disables USB power in the soft power off state isn't working so the USBs stay on when the PC is powered down. Tried reflashing the BIOS and no change so I'll try a CMOS reset when I'm back from work.

mickyflinn · 2025-01-28T09:57:47+0000

Still under warranty ?

thescouselander · 2025-01-28T10:00:05+0000

mickyflinn said:
Still under warranty ?

Yeah, I could send it back under warranty but if can fix it myself that's preferable to sending it away.

ED209 · 2025-01-28T10:18:39+0000

thescouselander said:
Yeah, I could send it back under warranty but if can fix it myself that's preferable to sending it away.

Ring their tech support, they can assist over the phone and if they cannot sort it then it can go back

tamzzy · 2025-01-28T18:55:25+0000

Yep, if Ocuk pre built then get them to sort it out.
You paid a pretty penny for that warranty so use it

adrichardson81 · 2025-01-28T21:05:09+0000

Also you risk avoiding the warranty if you try to do it yourself.

Is it more likely to happen on 1st boot after it's been powered off?

thescouselander · 2025-01-29T14:33:06+0000

So after a bit of whack-a-mole I think there's more than one issue at hand. Rebuilding the EFI System partition seems to have resolved the boot issues and I've got the USB S5 state to work properly. I then disconnected Asus' aura sync from the GPU which I think is part of the problem. I did see a nvlddmkm crash with events 153 and 14 this morning but the system didn't hang and kept logging and the GPU maintained the signal to the monitor although the screen was black. So the problem now is to get rid of the dreaded nvlddmkm errors. I've seem some on here blame the gpu power cable but there's plenty of other theories around. Has anyone got any experience of this?