So what you can try is take apart the trackpad and you will notice the 2 plastic "clips" or whatever you want to call them (see pic below) are smashed flush against the trackpad base when there is no click. You can bend these back into place as you can see in the left "good" picture below. I exaggerated the one in the picture to show the difference, you do not have to bend them up so high to restore the "click" motion but sometimes it helps.