Left analog stick doesn't respond to moving up or down.

The stick moves left and right and responds accordingly, however for some reason it's not responding to moving up or down. I'm not sure about the right stick as I can't even select a game with the unresponsive analog stick but I'm hoping that it works fine. I replaced the sensor conduits and the sensors themselves as well as clean out the stick themselves and use deoxidizer on top of some IPA. But the stick is just not responding. Can you help me?