This started happening a few weeks ago, at first it was almost completely random. I would be doing anything from browsing websites, mucking around with databases, playing games etc. and the monitor would suddenly go black and come up with a 'no signal' message. The only way to make the computer responsive after this was to hard reset. I say "almost random" because it would only ever happen when I was at the computer. I could leave it idling for days without issue. Until recently I've never been able to reproduce the issue, however, today it has begun to happen, without fail, every time I attempt to load up DOTA 2. I can play games that require a similar resource load(CS:GO) without a hitch, however the error now occurs as soon as the initial loading screen finishes in DOTA. A quick google search showed there have been a few people with the issue that also have an M6500, the fix that seemed most successful was replacing the standard hynix ram, however the ram in my laptop was replaced prior to buying it. Machine specs: Dell Precision M6500 Intel i7 920XM 4gb Samsung ram Nvidia Quadro FX2800M Windows 7 64bit I've also tried re-installing display drivers, both the Dell and Nvidia variants and 3 previous versions of them, as well as reseating the ram. I've recently ordered some new ram from iibuy however I'm not too confident that this will solve the problem. I should also mention that I use a secondary monitor with this laptop, however the issue happens even when it's disconnected.