Toshiba Laptop's CD tray doesn't stay closed

On a older Toshiba Laptop, the CD tray won't stay closed. It is open a inch. When I try to push it closed, it just springs open again. There is no 'click' when it normally would ;latch. This just started to happen out of the blue.
There was and is no disc in the tray when it unlatched by itself, nor was it banged or dropped. This is also when the Laptop is on ot off.

Any ideas? BTW, that release button has no affect.