How does the Touch Pro know the keyboard is open

[lordauric]

I have search and could not find a good answer to this. I bought a touch pro a few months back from a private seller. I've had a few keyboard issues and in fact I am planning to open it up and repair it basd on what I have found. But I have also been having the common issue where the phone goes into landscape mode when closed.

I wish to repair this as well but I have not found a good answer to what the touch pro reads to know the key board is open. Heard it was a magnet. If that is true where is it located because I haven't seen it in any of the internal pictures I have seen.

Any help or pictures before I open it up would be a great help. Thanks in advance.

This is a great phone, just badly put together.

EDIT: Forgot to add that when it gets stuck in landscape closed if I slightly open it like a cm or so and hold it at that point I can get it back to normal. That's why I wonder if it is a magnet and the magnet is just out of place.