@leond1186 start troubleshooting by connecting an external monitor. If it does the same thing, it is your GPU that has failed. If it does not, you do want to check if this is an issue with the driver. You did not tell us what OS you are using, but try to start it in safe mode and see if that works. If so, uninstall the current display driver and try to download the proper update for your model. you didn't tell us your exact model, so we cannot give you any more detail.
Take a few pictures or a short video and shows us what your monitor displays. [guide|21499]