Like other laptops our Dell Vostro can also have black screen issues. You need to know the causes of this error and the ways by which you can deal with it. Black screen error is a critical technical fault that poses a serious threat to your system. This may result in the system shutting down abruptly, it becoming unresponsive frequently, OS corruption and disk crash. There are various reasons due to which the black screen error arises. The reasons may range from video driver issues to internal system problems that have now become serious.