Computer won't boot to bios just a black screen

[Brachaboy]

Hello I've just discovered a problem with my computer today. I turned to plugs on and pressed the power button, and it made sort of a revving sound, which it does normally, but now it is revving 3 - 5 times not once. All of the fans work, but my monitor is blank apart from a little box in the corner saying dvi, which leads me to believe it isn't my gpu that is broken, it won't show anything on my screen, won't give me the chance to get to the BIOS or do a safe boot, I tried changing the data cable on my boot drive on a whim, please if you have any ideas or suggestions let me know

 

[nzrajput]

Which CPU, Mobo, GPU do you have?
Did you plug the monitor in the Built-in graphic port on the mobo?
Did you check with any other monitor?