I was attempting to add more RAM to my mother's laptop, but I noticed that I had purchased the incorrect type. After putting everything back together, the laptop would not boot. I've searched for solutions all over the internet, and can't find anything. The fan doesn't turn on, and there is no hard drive activity. I rechecked all connections that I am aware of, and nothing seems loose or out of place. I even removed the old thermal paste on the heatsink and added new paste. When I hit the on button, the power light is lit up, and heat is giving off by the heat sink. This is all that seems to happen. Any ideas?