Right at the top of the forum, not the top of the page, but the forum, you should see this text right above where it says "CHILD FORUM": FE Power Forums »FE Power Forums »FE Technical Forum.
Those are the links that will show the hierarchy of the forum structure. If you see that text, you should be able to click either one of the "FE Power Forums" links and that will show all of the forums categories.
In my favorites, I have the link to the FE TEchnical Forum as my saved link so that when I want to come here, it opens only the tech forum. If I want to see the other forums, I have to click the above link. If when you click your favorite and it is set up like mine, then it will always come to the tech forum. Once you log out, the forum doesn't know who you are and goes to the base forum page.