Once upon a time I opened my Lite-On DVD-WR LDW-851S disk tray and as I was putting a CD in suddenly it closed and the CD was half sticking out of the tray which was stuck midway (not noticing I had pressed the Eject button twice.) Ever since whenever I open the disk tray it automatically emediately closes, I have to grab the tray and hold it when it opens to insert the disk and then let go. Why is this?

. Anyhow, i dount think unplugging anything will make it better, its probably a malfunction inside the drive thats making it close right away. Unless your good at mechanical parts, i dont think there is a way for you to fix it.
Sounds like the wind-up-thingy is a bit off