old one died
success! I am ever so thankful for your online guides and even used your tools.
At first there was one hang up but by some kind of luck I found a speck of big dust on a connecting cable as I was madly trying to open the computer again without careful guides like when I started. Luckily it was only at the keyboard connection. Whew!
not really. It was helpful to have someone help me set up hard drive configure to a mac and all. It worked and I did it!
Phillips #00 Screwdriver
Flathead 3/32" or 2.5 mm Screwdriver
TR8 Torx Security Screwdriver