Machine in My Classroom

This is a big machine in my classroom, with a lot of buttoms and other things. But even it is a lot, I do not know how to work. Some of the buttons will work wonderfully, but some of them are not even work for ages. For example, the cassette tape cannot play. This is the part where I can control my DVD, unfortunately, it doesn't work.

Also, I can plug my microphone here. Also, it doesn't work. Anyways, technology now in these days is very handily but if the machine doesn't work is a real pain.