Here are some steps you can take to try and fix a blank or black screen on a computer:
- Connect an external monitor or projector to see if the display is properly working with another device.
- Check the cables connecting the monitor and the computer to see if the cables are firmly connected and that there is no visible damage.
- Test the computer components, such as RAM, hard drive, CPU, and graphic card, by running diagnostics tests.
- Replace the computer parts as necessary.
- Perform a system restore, resetting the computer to an earlier version.
