|We need more information. Please elaborate and include detailed system specs and the history of the system.|
Has it ever worked?
Have you had any recent warnings or problems like freezing, restarting.
Have you made any recent changes in software or hardware?
Are you using onboard video or a graphics card?
What CPU, power supply, memory, video, monitor, other expansion cards, etc.?
You have to be a little bit crazy to keep you from going insane.