Four Beeps indicates "The system clock/timer IC has failed or there is a memory error in the first bank of memory." There couple of things that you can try. When you are having trouble, reset the CMOS.

If your Windows 10 PC reboots to a black screen, just press Ctrl+Alt+Del on your keyboard. Windows 10’s normal Ctrl+Alt+Del screen will appear. Click the power button at the bottom-right corner of your screen and select “Restart” to restart your PC.

Power on the laptop. After the LED lights on the laptop appear, or you hear the hard drive inside start to spin, press the “Fn” key combination that sends the display to an external monitor. … If no image appears on the monitor, either the video card or motherboard in . . . Read more

6 fixes for the Windows 10 black screen with mouse pointer problem Remove battery & long-press power button (laptops only) Update your graphics drivers. Disable fast startup. Disable integrated graphics card. Log in using a different user account. Reset your PC. May 15, 2018

Some people get a black screen from an operating system problem, such as an incorrect display driver. … You don’t need to install anything—just run the disc until it displays a desktop; if the desktop displays, then you know your monitor black screen is caused by a bad video driver.

To fix the Windows 10 black screen before login, you will need to: Enable Safe Mode (via Recovery Environment) Uninstall and Reinstall Your Graphics Driver, and optionally, Disable Fast Boot. Nov 29, 2019

Black screen with cursor, or otherwise known as a black screen of death error, is typically a result of a Windows system crash – it occurs during a critical error, and the OS is not capable of the boot back.

Reset Windows will reinstall windows that are more likely to resolve the black screen with a cursor issue in Windows. Resetting the PC will delete all settings, apps, and files. Hence, we recommend you to take a backup of important data in Safe Mode before following the steps given below.

Try a Hard Reset. To fix a black screen on an iPhone or Android, the first (and easiest) step is to do a hard reset. This basically entails rebooting the phone’s software. A hard reset can be performed right on your phone, although the process differs depending on what type . . . Read more

The notebook screen display might remain black when there is a corrupted graphics driver or a problem with the LCD display backlight. To test the display, attach an external monitor and restart the computer.