Please list Dell model number and version of windows. Example: Dell Inspiron 3543, windows 10
In the meantime, I would suggest entering the service tag number (or use Detect Product) onto link below.
After, download / install the lastest Video driver from your Dell Product Support page.
Thank you for your message.
Do you see any video when you move the LCD back & forth?
Power off the computer using the power button start the computer by tapping F2 to get into BIOS & check if the issue persists.
Please click on my Dell username & send a private message with the service tag, registered name
Social Media Support