hi So i've got a DVD drive on my comp that isn't working too well. The tray opens fine. However, when i push the button to close the driver it moves in 1/5 of an inch and stays there, stuck. I push the button again and it goes all the way out again. I push the button a few more times and it does what i just described at least 3 times before it finally goes in. I was wondering if anyone else has had this prob and if and how they fixed it or does it need professional service?