As I mentioned in another thread, I recently purchased a 520ST lot with a mouse that only seems to want to move up. I've cleaned the ball and little rollers with no effect. I then thought I'd try my trackball but it would only move down and to the right so the cursor always ended up in the bottom right corner and would stay there, even if I moved up and to the left on the trackball. I tried it in both trackball and joystick mode.
I then tried just a joystick but I had to turn it sideways for the joystick movements to match the movements of the cursor and that seemed to work but the increments of movement were so minimal that it was a useless option, plus the joystick button didn't act like the left mouse button. I assume it's wired up too differently.
I guess my question is how do I know if it's the mouse or mouse port? Are these common problems with these mice and are there common fixes for problems like this? I have a soldering station if it comes to that. Any advice or recommendations appreciated.