My brothers laptop recently died, I believe due to a failed hard drive because when you turned it on you couldn't get out of the BIOS. I unscrewed the laptop's bottom from it's keyboard and replaced the hard drive but now it won't even turn on at all, I can't even get a BIOS screen. The only thing that I could visibly see that went wrong when I opened it was two ribbon cables came undone. One was very skinny and the other was wider and they went from the mother board to right under the laptop finger pad. I believe I plugged both of them back in correctly but I'm dead in the water. Any ideas or suggestions?