Acer Aspire E1-531 Service Manual page 84

Insert a pointed object, such as a paper clip, into the emergency eject slot to eject the tray.
3.
On the underside of the tray, use the plastic pry to detach the right side latch of the ODD bezel.
4.
3-16
Figure 3:15. Ejecting the Tray
Figure 3:16. Removing the ODD bezel (1 of 2)
Service and Maintenance