No start

I took starter out today and had it tested. They said starter was good. They said it actually sounded strong (Whatever that means).
So I turn key on, all dash lights go on and I hear the buzzing sound. It all seems fine. I turn key and nothing. It does not even make clicking sound when I turn to start it. I am not much of a mechanic but I was told that under hood to check some kind of starting or ignition starting fuse. It is the big square silver looking one. Well I look and I do not see where that big square fuse is at.
Could it maybe be a blade type fuse under dash of truck?

Is there any kind of fuse in my SUV that could be no good and preventing it from starting? Starter is good battery is bout six to eight months old so it is good. Battery terminals are clean. So why will it not start? I had a couple of signs indicating that starter might b going out soon. Although the signs I got seemed like it could be starter going out. And then again it almost seemed like it could be a short. But my first guess was starter because of past experience on other cars have owned through out the past years. So help!