You were hired as an intern, so your manager should be expecting you to come to him with questions and concerns. I'd actually be moderately concerned if someone in their second year of college had zero questions for me after a week of work. I would approach your manager and ask if you can set up some meeting time to discuss how your week has gone, and the difficulties you have faced. If he is not able to answer technical questions, ask what developer on the team is able to answer those types of questions. If you are supporting a complicated product, perhaps ask the manager to walk you through what the product does and how it does it. It is very hard to support something that you do not understand.
On my first day I was handed a ticket I had no idea how to fix. After spending a few hours trying to learn what I was doing, I reached a dead end and moved on to something else.
When fixing tickets, it is actually quite common for you to not have any idea what the problem is when going into it. A large part of debugging is simply trying to reproduce the problem, understanding what the code currently does, and what the code should be doing instead. First, you need to understand what the correct behavior is, and then going from there.
I often times have no idea what I'm doing on the job, and just keep Googling and rereading documentation to find out what to do.
Welcome to the real world haha. I've been a developer for 2 years now, and i still spend a fair amount of my day googling source code and documentation. In fact, a large amount of the questions asked on Stack Overflow, in general, can be solved if the question asker had read the relevant documentation.
The other co-op employee in my role is a fourth-year university student at his fourth co-op job, while this is my second year of school and only my first co-op job.
I would also approach this other intern and ask him for advice, as he has been in this situation recently himself. Ask him how if he feels the same way you do, and if he doesn't, see if he has any specific advice for you. He has probably felt the same thing that you are feeling at least once in his three other internships.