Question PC Looses Display Randomly While Still Running Until Restarted

[DugiHowser]

Hello,
I resently upgraded CPUs and during that time I did a complete tear down to clean to refresh everything however, now I am encountering issues which I cannot for the life of me figure out. Whilst using the PC (mainly gaming) I will loose display signal with the PC and fans still running as if nothing happened. Only way to restore video is to power off/on the PC. Prior the CPU upgrade my PC was running perfect without any issues but now, it does not feel right at all especially with the lose of display.
My old spec:
AMD 9800x3d (Noctua NH-D15)
Asus Crosshair 870e Hero
Corasair 64gb 6000mhz
MSI 4090 Liquid Suprim
Corsair RM1000w
Crucial 705 Gen5 1TB
Crucial 705 Gen5 4TB
WB Gen4 8TB
Toshiba 22TB

New Spec:
AMD 9950x3d (Delidded w/ TG Liquid Metal + TG Heatspreader + Artic Freezer III 240mm)
Asus Crosshair 870e Hero
Corasair 64gb 6000mhz
MSI 4090 Liquid Suprim (Refreshed with new pads and paste)
Corsair RM1000w
Crucial 705 Gen5 1TB
Crucial 705 Gen5 4TB
WB Gen4 8TB
Toshiba 22TB

I would like to mention that when I was refreshing my 4090 I first tried liquid metal. I used 2 coats of TG Shield all around the dye to be safe and avoid a short. Once all assembled my first boot was worring as my GPU was not being detected nor the fans not spinning. I resteated the gpu and re attached the cables to reboot this time fans on but no display still. I then tried to post via motherboard display and PC booting into windows and I was able to run Cinabench. I rebooted trying the gpu again still with no display. I then reset the CMOS and attempted to boot. This time around I would see the first ROG logo and by the 2nd logo I would loose display until shutting the PC off/on. This was occuring with the gpu display and motherboard display. I did a bios flashback and the PC would boot into windows via motherboard display. Concerned about my gpu I disassembled it and cleaned off all of the liquid metal and applied regular thermal past. After doing that the PC booted into windows via gpu. Which now brings me to the issue I am now with it loosing display randomly. I would like to note, that I have updated Bios, all mobo drivers, and nvidia drivers. I will try to comepletely remove the nvidia driver and install a previous version but I am worried that I might have ruined my gpu. I do remain optamistic that it could be something else causing the issue? Please help =(

 

[helpstar]

wash the GPU completely with isopropyl alcohol, maybe residues of the metal are still on the GPU

 

[DugiHowser]

wash the GPU completely with isopropyl alcohol, maybe residues of the metal are still on the GPU

Hi, I can't say that I "washed" the gpu but, I did properly clean the dye and heatspreader (areas where applied) along with everything around the chip with isopropyl alcohol and TG Remover multiple times. I did my best to inspect the gpu for any residue afterwards. But if you think that is the reason for my issue and nothing else then I can pull it back out and clean again it again.