So recently I turned on my G75 to the surprise of a black screen. So I plugged in an external monitor, which had no success. What is weird is that the fans spin up, the keyboard blacklight turns on and I can even log in (can tell from the sounds that play). However after about a week I still only have a black screen. I've tried multiple external monitors, taking out the battery etc. but with no success. It has happened in the past but seemed to have fixed itself and only lasted about an hour (presumably it was from me traveling long distance in cold weather). Kind of clueless as to what to do now. Is the gfx card pooched? If so, is it possible/viable to replace it? Thanks for any responses, appreciate it.