I have a sapphire radeon 7850, when I tried to turn it on today after school the regular sounds began. But my monitor said there was no signal. I checked the video cad and the fans were going, same with my cpu, and i could tell my hard drive was on based on the vibrations i felt from it. I tried moving my graphics card to a new pci port, that didnt change anything. I did notice that the lights on my keyboard turned off after a few seconds of booting the computer on. Any advice would be appreciated.