I need help guys. My pc won't turn on after I disabled the integrated graphics through the BIOS. I did so to give way for my new hd 6570 1gb so it won't eat all of my 4gb ram as there's only 2.2 gb usable. After I saved and exit my pc blinked black as though to reboot but no gigabyte or windows load screen comes out. I don't know what to do and I can't identify the problem. The monitor power button is blinking and the case power bttn led is continuous on. When I plug and unplug mouse in front panel USB it's led powers on for 5 sec then off again and the keyboard's numlock light is not on. how do I solve this ? Please help me