Over the past few months I've been having an issue where my laptop will blackscreen crash then immediately starts back up. It doesn't seem to be a power issue as it happens whether the battery is plugged in or removed. I've run a few memory tests and every test has reported no errors. I did have an overheating issue before this started happening but have long since fixed that issue by cleaning the fans/heat sink as well as replacing my thermal compound (currently use Arctic Silver 5). Even when it was an issue it never caused my computer to shut down, only causing a severe drop in frame-rate. I've taken a look at some of the components and haven't noticed any damage. The shut down currently happens more often when playing games but has been known to happen while in sleep mode, booting up, while screen saver is up, or even just sitting there (though not nearly as often as the others). Any thoughts??