My friends computer keeps shutting down after about a half hour. We noticed that the PSU fans havent been running at all. We went to the local PC service store who we are friendly with and they stated that the fans for this model shouldnt come on unless the PSU gets to hot. Well we noticed that the fans never come on and we believe that the PC shuts down after 30 minutes due to overheating. Does anyone have any solutions to this or know anything about this PSU. Any help is appreciated.