If your laptop screen is too dim or has no backlight, there are a few things you can do to try and fix the problem. Most laptops have brightness controls on the keyboard, and pressing one of these keys may have darkened the screen. Look for the icon of a sun; if it is blue or gray, you must use the “Function” key to access it. Press the key to adjust the brightness.
If this doesn't work, it could be due to a damaged graphics driver or a problem with the backlighting of the LCD screen. To test the screen, you can connect an external monitor and restart your computer. If an image appears on the external monitor, there may be a conflict between the graphics driver and the laptop's LCD screen, causing the laptop screen to turn black but still work. You can also try resetting Windows or a component reset, which erases data from the hard drive.
It's possible that the BIOS is out of date and you can no longer recognize the screen correctly, and that may be what's causing your laptop screen to darken. If the computer screen does not appear on the external monitor, press F4 until the screen image appears. Windows power management settings reduce screen brightness to save battery life when you disconnect from the power grid, but if the screen dimming is too intense, you can change it. You can also watch a video tutorial on methods to make a laptop screen go black but that still runs in five ways. If none of these solutions work, it's likely that your laptop's LCD inverter is failing or has failed.
We recommend using EaseUS boot disk data recovery software to access the hard drive when the laptop screen remains black. In addition, use EaseUS boot data recovery software to repair the laptop's black screen without data loss. If your HP laptop screen has turned black but the computer is still working, there are a few things you can try to fix the problem.