I acquired a Sony Vaio VGN-S150 laptop, and basically it was dropped onto a carpeted floor. Only problem now, is that it is very inconsistant when it comes to starting-up. For the most part, the power comes on, the hard drive and cooling fan start-up, but there's no sound or screen activity. I disassembled it to see if I could find something loose or damaged, and found nothing. I want to be sure it's working 100% before I put it back together. Another problem, when it DOES start-up, the image only occupies 2/3rds of the screen for whatever reason. Any suggestions?