A broken analog stick / joystick is one of the most common psp slim problems. Fortunately, it can be replaced without doing any major psp surgery.

You can purchase a replacement PSP slim analog stick in the Zombie Store.

Symptoms of a broken PSP slim analog stick:

* moves on its own
* stuck in one direction
* top plastic part broken off

Stuff you will need:

* A couple of small screwdrivers (phillips, flathead)
* New PSP slim analog stick / joystick

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To get to the PSP slim analog stick you have to remove the faceplate (and void the warranty). This is covered in the PSP slim 2001 screen replacement tutorial. You don't have to remove the screen to remove the analog stick.

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psp slim 2001 joystick removal   Lift the analog stick up and slide it out to the left. You might have to wiggle it around a little bit, but it will come out. Circled in green is the little plastic contact that lets the joystick talk to the motherboard. Try not to lose it

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This is a shot of the joystick with the cap removed. Installation is the reverse of removal.