Geistware,
I don't remember the actual terms the tech told me but,
I know it had something to do with the gimble spring. I believe
he told me that the spring had to be reset nothing was replaced.
I could have probably fixed it myself if I had known what to look for.
Like you had said in an earlier post
It is better to get a repair history on it just in case you have a lemon.
I was just happy to get it back in such a short amount of time.