Dell XPS 17 9710 Persistent Screen Dimming Issue – Half Screen Appears Dim

I've been using my laptop for over three years now. Recently, I started experiencing an issue where the right half of the screen appears dimmed, with a noticeable gradient transition around the middle. The first time this happened was about five months ago, but restarting the laptop a few times seemed to temporarily resolve it.

However, the problem has since become consistent—every time I power on the laptop, half of the screen is dimmed. Occasionally, after using it for an hour or so, the screen returns to normal on its own, but the issue reappears during the next session.

At first, I assumed it was a hardware issue—possibly with the display or backlight. But the fact that it occasionally fixes itself at random makes me wonder if it could instead be software- or system-related. I’ve tried restarting the system multiple times and adjusted various power and graphics settings, but nothing has resolved the problem permanently.

Any insights or suggestions on how to diagnose or resolve this would be greatly appreciated.