So there I am working away, making the keyboard happy by clicking away at the keys and suddenly, my monitor just goes dark! I have the base Nvidia Gforce 120 (So it will get replaced in time but, ideally, not yet $$) and the temperature is never over 100 F - great ventilation, cold apartment, and SMC fan control and noise cancellation headphones. The Monitor is an ASUS MT276 (LED driven LCD 27 inch) and heretofore, it has been nothing but excellent. While the monitor is on almost all the time I am awake, it does go to sleep and return from sleep with no problem. The monitor is about 2 years old but probably a bit less. Overall, the monitor is cool to the touch and there is a very small (warmer) difference in temperature towards the upper left of the screen but nothing seems amiss otherwise until... Any ideas? Monitor or video card trouble?