So today I was trying to open my CD tray, and apparently I could not find the button to open it. Nor could I find my D:/ drive to open it either. I have tried to open it through the emergency hole, (using a paper clip) and it didn't open still.
on the back of the cd drive, on the inside of the pc, there are two plugs. One is power, one is data. however, seeing as how you have opened the tray, it is more likely the data cable.