Windows 10: Random Failure of keyboard and black screen

Hi all,

New to forum...looks like a good place for help. I'm not a PC expert, but used to build my own PC's , so I'm pretty familiar and comfortable debugging/repairing hardware and software issues. Been using PC's since Windows 1.0..

Anyway, New-ish HP Envy Ryzen 5, 12 GB Ram. (2) 1TB hard drives. Dell Monitor, Windows version 10, build 1803.

I experience random (once a week or so), where upon boot up, PC gets past post, i see HP logo and spinner telling me Windows is loading. I see my NUM lock light come on...but then go off. At that time, screen goes dark, keyboard and mouse are unresponsive. BUT...PC is still on and running.

If I power-down, then back up...most times all is well and PC /Windows are working. And as long as I leave PC on, everything works great.

Sometimes, when I reboot, HP system diagnostics kicks in and tries to diagnose (??) PC. Usually fails to diagnose anything, but gets stuck in a loop.

I routinely run performance checks, malware checks, use Kaspersky and use a host of tools to keep the PC running well...all checks say all hardware and software is A-OK !!

I'm stumped. HP support told me to clean disk and do a full Windows clean install (as expected). A local HP service shop said if NUM lock light goes out, than I have a bad motherboard, no 5 volt going to KB.

I did have an older KB (PS2 plug) connected to a USB3.0 port (with adapter). I have now put a new keyboard (USB 2.0) into a USB 2.0 port, but didn't know if that might be a cause??

Sorry for all the details, just wanted to state the facts.

Any thoughts or help would be appreciated.

John

:)

 

Black Screen, Screen Flickers, Random Freezes

Hi,



Thank you for posting your query in Microsoft Community.

I understand your concern and will assist you to resolve this issue.

I suggest you to follow the steps below and check if it helps.

Method 1: I suggest you to update the Display drivers and check if that helps. If that issue persist please uninstall and reinstall latest drivers available in manufacturer website.

• Press “Windows + X” and select Device manger.
• Select Display Adapter and expand the driver icon.
• Right click on the driver icon and click on Update.
• Follow the onscreen instructions to update the driver.

Refer the link below and check if it helps

Troubleshoot black screen problems

http://windows.microsoft.com/en-us/windows-10/troubleshoot-black-screen-problems



Hope this information was helpful and do let us know if you need further assistance. We will be glad to assist.

 

Random black screens

Getting random brief black screens (with little notification sound when my screen comes back), random changes in setting such as fonts, and a WDF violation when computer refused to turn off, and then after being unplugged, refused to boot for some time.