Check if the laptop is powered on and the battery is charged
Plug in the charger and try again
Increase the screen brightness
Disconnect all external devices
Press the display toggle key combination
Wake the laptop from sleep mode
Restart the laptop
Force shut down by holding the power button, then turn it back on
Reseat the battery if it is removable
Check for loose or damaged display cables
Connect the laptop to an external monitor
Update or reinstall the graphics driver
Boot into safe mode
Run a hardware diagnostic test
Reset the BIOS or UEFI settings
Remove recently installed software or updates
Check for overheating and clean the vents
Replace the screen if the display is physically damaged