I got a new HDD installed into my PC and when I was connecting my montior back to the Geforce6800U, I pushed it in quite firmly which caused my PC to reboot and no signal to go through to the monitor. However, when I hard-reset the PC the monitor came on fine. It seems when the cable gets pushed too hard, it causes a reboot. Is there any reason behind this? The second input port for a second monitor, which I use, doesn't do this.