Plug any monitor into this pc and the monitor goes black. Like hibernating. The light turns yellow. Even if the pc is turned off. I put in a graphics card thinking it was the integrated video, but the same thing happens. monitor basically shuts down or hibernates or something. The pc seems to run fine though, except I can't get a response from hitting keys like ctrl/alt/del 2x should shut down but nothing or the mouse. Like i said, even when the pc is off, plugging any monitor into any port makes the screen go from normal to black. got any suggestions? I'm clueless.