dvd-rom tray won't stay closed

I have a Toshiba SD-M1202 that one day refused to open, then at next boot opened and stayed open. Now it'll close, but re-opens after a few seconds whether there's a DVD in it or not. Is there a simple fix, or should I throw it away and start over?

 

Hmmm....the only time I've seen something like this happen is when there's something caught in the tray, stopping it from closing properly. I would suggest that you make sure that isn't the case.

 

Thanks for responding so quickly. It seems to be closing all the way without any obstructions, but I'll pull it out and pop the lid so I can see more.