Main analog stick "moving up" problem

[alzen]

As said in subject, I have problem with my analog stick(the main one, gray). It moves "Up" on it's own from time to time(while it's in the center position); but sometimes it locks itself like this and moves "Up" until I put it into the "Up" position manually and back to center again.

Is there any way to fix it? I hope there is as it drives me mad when Link starts to run forward in Wind Waker when I don't want him to do so

[webhdx]

If you hold the joystick when you turn on the GameCube, the system will read the direction as neutral. Hold the X, Y, and Start buttons together for 3 seconds to recalibrate the controller. If the problem persists, most likely analog stick needs to be replaced.

[Duhasst0]

It's a bad analog stick, you need to replace the stick on the circuit board