Here is a list of recommended actions to address the laptop screen dimming issue:

1. Check the power settings: Dim the brightness levels in the Power & Sleep settings in the Windows operating system.
2. Check settings in the display panel: If your laptop has a separate display panel with adjustable brightness and contrast settings, review them.
3. Reinstall relevant display drivers: Identify the graphics driver you have installed on your laptop and update it to the latest version.
4. Check power adaptor cables: Look for any loose connections between the various components of the power supply.
5. Replace the monitor: If your laptop is experiencing hardware issues, you might need to replace the monitor.