My mother has a Gateway Laptop NV77H21u that is in need of more RAM. So I did some research found out the max memory supported which happens to be 8 GB, she currently has 4 GB. Now I don't have an over abundance of experience but many times I have opened up my laptops for one reason or the other so I saw no problem here. So I accessed the area that has the RAM so I could get the information off of the stick and basically order the exact thing, no fuss no muss, right? Wrong! I put it back exactly as I took it out, closed it up, turned it on and now all she has is a black [bleep] screen......what the frig did I do?