Some of my keys on my laptop stopped working so i updated the drivers but still the same problem, so i opened up the laptop and reincerted the ribbon which fixed the problem, but then the mouse pad wouldnt work, so i then took all 3 ribbons out, the power one, mousepad and the keyboard one and put then back in, and have tried this many times, but each time the computer turns on and then off after a few seconds, the fan turns on aswell as the cd drive light. I have taken the battery out and only used the charger etc still doesnt fix it, laptop turns on to a black screen and then back of, anyone have any idea thanks???