the only thing i can tell you to do is hold down the eject botton for at least 10 sec. or so intill you here it beep. that might reset the mech. before you send it back signup for psplus, you can save your game files online.
Hello there & Welcome to the PlayStation Forums,
Please view this similar thread in regards to the BD/op. drive issue...
In your case, it's not just the 'loading tray' but the entire drive itself, that needs to be replaced.