Restart the laptop
Check the display cable and reconnect it if possible
Disconnect and reconnect any external monitor
Update the graphics driver
Roll back the graphics driver if the issue started after an update
Reinstall the graphics driver
Update the operating system
Check display color settings and reset them to default
Disable night light, color filters, or HDR
Run a hardware diagnostic test
Boot into Safe Mode
Test with an external monitor
Check for loose or damaged screen hardware
Replace the LCD cable if faulty
Replace the laptop screen if damaged
Seek professional repair if the issue continues