A sudden purplish screen that only clears after a restart can be caused by the display driver, display settings, or the display hardware.
Try these steps in order:
- Restart the graphics driver when the issue happens.
- Press Win+Ctrl+Shift+B.
- The screen may flicker briefly while Windows refreshes the display driver.
- If the color returns to normal without a full shutdown, the graphics subsystem is likely involved.
- Turn off Night light.
- Go to Start > Settings > System > Display.
- Under Brightness and color, turn Night light off.
- Night light changes the screen to warmer colors, so disabling it helps rule out a color-temperature setting issue.
- Check whether brightness is changing automatically based on content.
- Go to Start > Settings > System > Display.
- Select Brightness.
- Set Change brightness based on content to Off.
- This stops Windows from automatically adjusting brightness and contrast based on what is on the screen.
- Test with another display if available.
- Connect the PC to an external monitor or TV.
- If the purple tint appears only on the built-in display, the screen panel may be the problem.
- If the issue continues and the screen becomes unusable until restart, treat it as a possible hardware problem.
- Similar display discoloration and unstable screen behavior can indicate a hardware fault such as the internal display connection, display cable, or motherboard/video hardware.
- Avoid opening the device unless qualified, because internal display connectors are delicate.
If the problem keeps returning after these checks, professional repair or device support is the next step.
References:
- Change display brightness and color in Windows
- Use color and contrast for accessibility in Microsoft 365
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