I bought this recently to replace an older monitor, which was my primary monitor. It is working fine except for one small problem.

It's screen is noticeably lighter than that of my secondary monitor.

downloaded and installed the driver.

I have tried various things: downloading and installing the driver; reducing the number of profiles to exactly one — the one with this monitor's name on it; reducing gamma in Windows 10; reducing brightness to 0; reducing RGB levels to 0; turning Bluelight on and off — but none of them solve the problem.

It isn't that they have no effect. The image (from a slide I took of a tree at down) does darken — but it is still washed out. Note that the same image is on the secondary monitor, and the difference between the two is both striking and obvious. It is as if some other source of light, which cannot be controlled, is permanently on. Is this some new technology being used on the theory that people don't actually need to see what's on their monitors anyway?

Is anyone else seeing this? Is there any setting I am missing?

Thanks in advance for any responses.

[Edited the thread to add issue detail]