The laptop screen black occurs when there is a corrupted graphics driver or a problem with the LCD display back light. ... If an image displays on the external monitor, there might be a graphics driver conflict with the notebook LCD display that leads to laptop screen black but still running.

How do I stop my laptop screen from blacking out?

Go to Control Panel\System and Maintenance\Power Options and 'change plan settings' for your current plan. Under 'put the computer to sleep' choose 'never'. I hope this helps.

Why does my Dell laptop screen keep going black?

The main cause of the Dell black screen issue is a bad connection between your graphics drivers and your operating system. Another possible cause is a display adapter driver update issue. You may also run into a Black Screen of Death after system updates or installations, which you may need a reinstallation of Windows.