So i purchased a used Black macbook in great condition in february and it is one of the best computers i have ever owned. except for these problems 1.The clicker of the trackpad does not always click on what i am clicking on i have to press it more than once and its very anoying. 2. The screen flashes while im in the middle of something. 3 Also the hinges are very loose when i want to close it when i leave it about 2 inches away from closing it automaticly closes and you can just tell the hinges are very loose. so please help me with these problems or tell me what to do i really like this computer.