GL753VE Asus Rog Over heating problems

Good day everyone! So my laptop is always over heating. I dont even play games on it any more. The Rog fan doesnt even seem to be working or its not on. I have tried reading some of the other post about asus computer over heating but the truth is I dont understand what most people are saying. I dont know anthting about the GPU or voltage etc. If someone can please explain to me in simpler terms what to do? I dont know which driver I need to update? I dont have my computer in high performance (At least I think I dont) Any help? Kind regards