Probably not virus related.
It is a desktop or a laptop? What brand? What operating system do you use, and what version?
Your screen/monitor may be disconnected or dead. You may have a problem with your video card. Make sure that the monitor is connected to the computer and to a power outlet. Make sure that the monitor is actualy turned on. Try another monitor. Try connecting the monitor to another computer.
Your main drive may have some problem. Make sure that it's properly connected in the computer.
Your OS installation may be corrupted. As you don't tell what operating system you use, it's difficult to help you on that isue.
Electro, September 2012
