Windows 10: Black screen and freeze issues, can't see BIOS nor Windows

Hello,My specs :Custom buildASUS Z390-AI9900kRTX307016gb RAM.Windows 11I've had freezes and black screen problem for a long time on Windows 10 occuring at random moments gaming and while browsing. To temporarily fix the issue I had to hard reboot my PC. I found out that I could use my computer remotely when the freezes occured with Parsec although this was just to make sure my GPU was working as it's not an old one. Although sometimes I had black screens when rebooting and doing so a couple of times brought me back to Windows again.I've then tried a lot of fixes I've read online such as roll

:)

 

strange issues (black screen, blue screen, and freezes)

Memory or PSU gets my vote......although the 8800GT is getting alittle long in the tooth now.....but I'll stick with my 1st 2 suggestions.....get into the bios and check your voltage on your +3.3/ +5/and +12 lines and list them here.


Hope it helps. *Smile

 

New laptop hardlock with black screen

I have a new notebook, running Windows 10 Fall Creators Update, which is randomly freezing, showing a black screen. System specs:

• intel core i5
• HD is an SDD, 250GB
• GPU: Intel HD graphics 620

Symptoms:

• happens randomly, related to no particular reason, time of the day, and programs running
• when freezes, the notebook screen is "active" (back light is on) but completely black; external monitor, connected via HDMI, is black as well
• when freezes, no key input is responding. I tried to press "CAPS Lock", which has a led on it, and the led is not toggling
• I noticed I can keep the PC on for several days, without any problem. It always freezes whenever I'm actively using it

What I already tried:

• reinstall Windows from scratch (even starting from an external USB drive)
• run windows in "clean boot" mode (all non-MS services disabled, all startup programs disabled)
• update the BIOS, and all "relevant" drivers (GPU, System Firmware, network interface, bluetooth, ...) of the PC to the latest version
• testing the memory with MemTest86+: no issues, after several steps
• stressing the GPU with FurMark: reached quite an high temperature (70°), but no issues
• stressing the CPU with IntelBurnTest: reached quite an high temperature (70°), but no issues

Now, I would guess it's an hardware problem, but the strange thing is that we ordered 6 identical PCs, and this is happening on 4 of them. Therefore, for "statistical" reasons, we don't think it could be possible that all of them shows an HW issue... It only happens with a different rate from one PC to another (for instance, happens daily on my PC, and once a week on another)
Any idea on how to investigate this issue further?
Any test / improvement I can do?

 

strange issues (black screen, blue screen, and freezes)

checking in the BIOS is useless, those things are never accurate. he'll need to use a multimeter to test that.