Question Monitor, keyboard and mouse turn off, PC stays on

VenomRaven

Prominent
Feb 26, 2020
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Hi.

Had some issues with my PC with full reboots happening even when under low load/idle etc.
Recently upgraded CPU, MB (and RAM).
However I now have a new issue where the monitor keyboard and mouse all turn off while the fans of the PC (and presumably the OS) remain on.
This can happen a minute or two after turning on the PC or maybe after 30-45 minutes or so.

Has anyone got any advice for this?
Issue with the power supply maybe?
I've seen lots of similar threads reporting the same issue, but none of them seem to express solutions.

Specs:
Windows 10
MSI MAG B550 Tomahawk
AMD Ryzen 5 5600G
Ballistix RAM (8GB)
Corsair 650w i power supply
Nvidea GTX 980

I actually have two identical Corsair 650 I
I will try the other one for a bit see if it makes any difference.

EDIT:
Ive updated all drivers, BIOS, reinstalled windows, and tried my other PSU. Same thing happens.
After an indefinite time all peripherals (including audio) turn off while the PC itself remains on.

Trying at the moment without graphics card. When I tried this on the old build it made no difference. If this doesn't do anything on the new build I will replace the PSU for a third PSU.

EDIT 2:
Without GPU - I get a reboot instead of peripherals going unresponsive.
No idea what to try now as I have swapped out all components except for hard drives.
 
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