Adjust screen brightness and display settings in Windows 11. Discover easy steps to reduce brightness, change display, and optimize monitor settings.
Perhaps the Dell solution applies to other AIO before 2019 only. Not sure if you change brightness of the 7700 AIO in Windows then use it as external monitor, whether it would remember the change or revert to default. Dell announces two new OptiPlex 7460 and 7760 AIO with pop-up webcams and a refreshed OptiPlex 5060 Micro - NotebookCheck.net News
To set or adjust the brightness and contrast of a Dell monitor, see the monitor's documentation. This article provides information about how to find the documentation of your monitor to get model-specific information.
Dell On-Screen Display (OSD) allows you to control the brightness bar, change the input source, and turn the screen on or off through the OSD button. If Dell OSD application did not work for you, that left with not much to try with. You may try to create a high performance power plan using Control Panel. Then check the brightness slider again, from system tray.
Optiplex 7460 Too bright, brightness won't go down. Troubleshooting done: Changed brightness from Display Settings to 10% and is still too bright. No Change Changed brightness from Power ...
Learn how to adjust the brightness or change video settings on your Dell laptop.
The Troubleshooting section of this Dell knowledge-base article provides information about troubleshooting common issues with the Dell P2422H monitor. The section has troubleshooting steps on how to resolve power issues, video issues, color or clarity issues, distortion issues, horizontal or vertical lines, brightness issues or pixel issues and so on.