My friend gave his laptop to try and fix because I am pretty tech savvy, although had virtually no experience with laptops. His has the problem of not turning on, I couldn't hear the hard drive stating to spin so I took the one out of my laptop and put it in his. Nothing changed but then when I put my hard drive back, my screen wont turn on, just the lights and I cant hear the processor, or harddrive start up. nothing but the little power lights. I really need you help guys, I am selling this laptop to friend of my brother this week Any help will be greatly appreciated!