I've connected a second screen and it's worked great until now, image is coming and going

[Jonas12345]

I've had the second screen connected to my system for a couple of years and end of last week, the screen started dropping the image for a split second, and coming back.

It got progressively worse and right now, it's dropping the image, remains black for ~10 seconds, and then it briefly shows the image for 1/2-1 second and immediately goes black again.

I've tried updating to the latest drivers from the HP drivers page for my computer model, both the NVIDIA one and the  Intel one, without any success.

I've tried switching the input port on the screen to the other HDMI, no change.

I've also tried connecting another computer to the screen, and tried both HDMI ports and I get stable image.

I've tried switching the HDMI cable, a long-shot but getting desperate now.

EDIT: I've now tried a difference screen with the same result/no image.

I've run out of ideas.

Any ideas what to try next, or what might be going on?

[Prométhée]

hi

little summary, to check if I understood correctly?
You have a screen that works perfectly with another computer..
Installing or reinstalling the drivers does not change anything.
The only thing you don't mention I think
it says original windows 10 here, and I see it says windows 11!
So do you know if you have installed windows 11, if there is a report?
but I think a graphics card may be faulty it says NVIDIA® GeForce® GTX 1050 (4 GB GDDR5 dedicated)
A last test to do would be without this graphics card, but quite risky with this type of computer, and probably not easy
So before, if no other choice, since you seem to have tried everything
Factory reset, then try again, if that doesn't work it's probably the graphics card

https://support.hp.com/us-en/product/hp-envy-curved-34-b100-all-in-one-desktop-pc-series/17199806/mo...

[Jonas12345]

Yes, you got it!

Currently Window 11. It shipped Windows 10 and I've updated it via Windows Update.

I'm not sure when I updated to Win 11, but it's a good long while ago, probably closer to a year ago.

Do you think it's possible to switch from the NVIDIA GPU card to use the Intel GPU on the screen output to see if that solves the problem?

Replacing the GPU looks easy enough - found a YouTube video - but I assume it's quite costly, so wouldn't want to try that without being [fairly] certain it will work.

[Prométhée]

Yes, that's what I was saying, I think it could allow you to use the integrated, but for that you must most certainly remove the graphics card!
at least I think if you feel able to do it, it's something to try!

check if this help :

HP ENVY Curved 34-b100 All-in-One - Motherboard Viewer

 HP ENVY Curved 34-b100 All-in-One Desktop PC Series - Part Locator

Upgrading & Servicing Guide