Check the power adapter, battery, and charging light
Perform a hard reset by holding the power button for 10 to 30 seconds
Disconnect all external devices and accessories
Increase screen brightness
Toggle the display output key combination
Connect the laptop to an external monitor
Reseat the RAM modules
Remove and reinstall the battery if removable
Boot into Safe Mode
Update or reinstall display drivers
Run startup repair or automatic repair
Check for BIOS/UEFI display issues
Reset BIOS/UEFI settings to default
Test for backlight failure with a flashlight
Replace the screen if the display panel is faulty
Seek professional repair if the motherboard or GPU is damaged