Hi,
Posted a reply at your other thread:
http://rog.asus.com/forum/showthread.php?45556-G74sx-goes-into-hibernation-mode-when-right-fan-does-...You might consider posting a new thread in the "Older G Series Notebooks" section to see if other G74Sx owners have more ideas, or I can move your thread above to that location if you prefer.
Anyway, I assumed your system was shutting down instead of hibernating when I replied in the thread above, but if it's really hibernating, you may want to check your Windows settings and disable all the actions to hibernate in case there is a malfunctioning lid switch (or power button??) that is actually causing your system to hibernate.
If the problem is not too difficult to catch though (provide steps if necessary?), I would hope your service center could just solve it for you to save you the trouble.