Question What would cause a computer’s displays to go out with no noticeable cause or consistency?

Mar 21, 2020
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When this happens the windows device disconnect chime plays and occasionally fans speed up (presumably graphics card). I have a gigabyte 2080 I built and got all my parts in like October. It’s been happening for about a week and can happen when I’m just watching YouTube as well as video games. What I’ve done so far to try and fix it is clean out my computer with compressed air, moved card to another pci slot, as well removed all power supply cables to make sure nothing seemed off as well as clean all the ports with air as well.

Specs:
CPU: i9-9900K
PSU: Seasonic FOCUS Plus 850 Gold SSR-850FX 850W
MB: Gigabyte Z390 Aorus Pro
Graphics Cad: Gigabyte GeForce RTX 2080
RAM: G. Skill Ripjaws 16GB 288-Pin
 
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Mar 21, 2020
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Update: My computer no longer will fully boot. Where the motherboard used to be ambiently lit up when off, it no longer does and when I turn the computer on they turn back on but I don't even see the motherboard boot screen, the displays just don't show anything/ no normal boot sounds through speakers.