Dell U2312HM The current input timing is not supported by the monitor display. Please change your input timing to 1920×1080@60Hz or any other monitor listed timing as per the monitor specifications.

If you see Input Not Supported Monitor error on your Windows 11/10 PC, you can apply any of the solutions in this post to resolve the issue.

The 'Input Not Supported' message displays on the monitor before Windows even loads, there's not even a bios splash screen.