Please help with HP screen flickering on boot/logon

Hi guys, I'm asking about my partner's laptop (so not the data in my signature, but the following):

Device name LAPTOP-EKQVLFOK
Processor Intel(R) Core(TM) i5-1035G4 CPU @ 1.10GHz 1.50 GHz
Installed RAM 4.00 GB (3.69 GB usable)
Device ID ED485D3F-0C4D-4D2F-AE90-77DBE9865814
Product ID 00325-81547-86134-AAOEM
System type 64-bit operating system, x64-based processor
Pen and touch No pen or touch input is available for this display

Edition Windows 11 Home
Version 23H2
Installed on ‎31/‎10/‎2022
OS build 22631.3296
Experience Windows Feature Experience Pack 1000.22687.1000.0

It has an intermittent fault, which looks like a video driver issue, but updating & uninstalling/auto-replacing hasn't fixed it. It usually happens either as she's logging on, straight after, or a short while after. The screen goes dark with random flickering vertical and horizontal lines. I've also seen it settle into a recognisable display of the desktop, but shifted slightly to the side.

It can happen on booting up, restart and - I think - coming out of Sleep (hibernate isn't in the power option settings currently). It seems it might be worse when the laptop is left for a few hours (i.e. doing several sleeps, restarts or closing down and re-booting it seems to behave).

We tried the usual fixes - updating Windows, updating the video driver ("running the most recent") and uninstalling it and rebooting so Windows downloads a new copy. I've run some tests on the HP support site (although there are more in-depth ones I haven't yet tried).

I set "fast startup" off to see if that fixed it, when I thought it was just from a boot (she always used to power down at night rather than leave it on Sleep). It hasn't (although maybe it's less often now?).

At one time (booting up) it seemed to do it every time, and she would have to hold the power key to do a hard reset/reboot - whereupon it would fix it.

I've tried manipulating the screen and hinge, but I can't get it to flicker doing that.

I'll try the HP extended tests next, but they take several hours, and I just wondered if anyone has any suggestions or diagnostic tools we could try. Many thanks.

Hey.
While it looks its not related to GPU , perhaps its about a third party app , or driver , or setting.
Work to Safe Mode and check if the problem remains. If not , something that loads is the cause.

Run the V2 log collector > post a share link




HP has multiple diagnostics:

UEFI: https://ftp.hp.com/pub/softpaq/sp151501-152000/sp151612.exe
Bootable: https://ftp.hp.com/pub/softpaq/sp151501-152000/sp151612.exe
Windows: https://ftp.hp.com/pub/softpaq/sp151501-152000/sp151566.exe

The Windows can run in the background while in use and it has interactive tests.

They all can run overnight while sleeping.

It does sound like it might be a graphics driver thing again with HP and latest Windows 11. I ended up having to install the latest Intel graphics driver as there wasn't a newer one on HP. Or it could be a hardware issue so I'd listen to Zbook not me